add rules, guidelines, fix HTML code, move compressed tarball in inventory

By changing the _inventory_order_ of the compressed tarball from
**100000** to **1415926535**, the compressed tarball will land at
the top of the secondary file list and remain still easy to find.

Updated the `manifest.numbers` spreadsheet and rebuilt
the `.entry.json` files.

Added `next/` directory to hold the next IOCCC rules and guidelines.
Added `next/README.md` that `bin/gen-top-html.sh` uses to form
the `next/index.html` file.

Added _Rules and Guidelines_ link to the sidenav bar to link to the
`next/index.html` file.

Added _IOCCC Rules_ as `next/rules.md` that `bin/gen-top-html.sh`
uses to form the `next/rules.html` file.

Added _IOCCC Guidelines_ as `next/guidelines.md` that `bin/gen-top-html.sh`
uses to form the `next/guidelines.html` file.

Changed `bin/gen-top-html.sh` VERSION from "1.2.4 2024-04-13"
to "1.3 2024-04-14".

Prevent `pandoc(1)` from interpreting the commented out language
of a markdown code block as a code class.  So a markdown such as:

````
``` <!---sh-->
...
```
````

that produced HTML of the form:

```html
<pre class="&lt;!---sh--&gt;"><code>...</code></pre>
```

will now produce HTML of the form:

```html
<pre><code>...</code></pre>
```

NOTE: Before when the language of a markdown code block
was not commented, the HTML produced by `pandoc(1)` was
oddly indented with extra whitespace on the first line
of the code block.  While commenting out the language
of the code block removed some of the odd intending,
it left a weird class in the HTML pre block that
surrounded the HTML code block.  This hack prevents
`pandoc(1)` from assigning a class to the HTML pre block.

Changed `in/md2html.sh` VERSION from "1.2.1 2024-04-13"
to "1.3 2024-04-14".

Added `make gen_sitemap` to end of both `make www` and `make
quick_www` in top level Makefile.

Ram `make www` to test under macOS and to perform the above.

**IMPORTANT NOTE**: The current `next/rules.md` and `next/guidelines.md`
are simply the 2020 IOCCC Rules and Guidelines converted into
markdown form.  There are **NOT** the Rules and Guidelines that
will be used the IOCCC MOCK, nor the next IOCCC.

TODO: Improve the `bin/gen-status.sh` tool to modify the top of the
      `next/rules.md` and `next/guidelines.md` files to keep them
      in sync with the _contest_status_ as found in `status.json`.

TODO: Improve the look and feel of the `next/rules.md` and
      `next/guidelines.md` markdown files.

2012/zeitak/.entry.json

@@ -147,7 +147,7 @@
 	},
 	{
 	    "file_path" : "2012_zeitak.tar.bz2",
-	    "inventory_order" : 100000,
+	    "inventory_order" : 1415926535,
 	    "OK_to_edit" : false,
 	    "display_as" : "tbz2",
 	    "display_via_github" : false,

2012/zeitak/index.html

@@ -88,6 +88,7 @@
     <div class="sidenav">
       <a href="../../news.html">IOCCC News</a>
       <a href="../../status.html">Contest status</a>
+      <a href="../../next/index.html">Rules and Guidelines</a>
       <a href="../../faq.html#submit">How to enter the IOCCC</a>
       <a href="../../faq.html">FAQ</a>
     </div>
@@ -141,16 +142,16 @@ Location: <a href="../../location.html#IL">IL</a> - <em>State of Israel</em> (<e
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <h2 id="to-build">To build:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    make</code></pre>
+<pre><code>    make</code></pre>
 <p>There is an alternate version that is slightly deobfuscated. See <a href="#alternate-code">alternate
 code</a> below.</p>
 <h2 id="to-use">To use:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    ./zeitak &lt; file</code></pre>
+<pre><code>    ./zeitak &lt; file</code></pre>
 <p>where <code>file</code> is the file to be checked for nesting errors. For example, you may
 try <a href="incorrect.c">incorrect.c</a> and the program itself. You may also run it on
 text files that are not code.</p>
 <h2 id="try">Try:</h2>
-<pre class="&lt;!---sh--&gt;"><code>    make test</code></pre>
+<pre><code>    make test</code></pre>
 <p>NOTE: the program prints an error and exits on the first nesting error so it
 will not detect multiple issues.</p>
 <h2 id="alternate-code">Alternate code:</h2>
@@ -158,7 +159,7 @@ will not detect multiple issues.</p>
 deobfuscated by the author. You may find reading it helpful in your attempt to
 understand this extremely subtle entry.</p>
 <h3 id="alternate-build">Alternate build:</h3>
-<pre class="&lt;!---sh--&gt;"><code>    make alt</code></pre>
+<pre><code>    make alt</code></pre>
 <h3 id="alternate-use">Alternate use:</h3>
 <p>Use <code>zeitak.alt</code> as you would <code>zeitak</code> above.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -188,7 +189,7 @@ around it’s position.</p>
 <li>Ignores parenthesis inside strings or character constants, so no errors
 will be detected in the following line:</li>
 </ul>
-<pre class="&lt;!---c--&gt;"><code>    printf(&quot;)&quot;);</code></pre>
+<pre><code>    printf(&quot;)&quot;);</code></pre>
 <ul>
 <li>Doesn’t get confused by the <a href="../../1984/anonymous/index.html">1984/anonymous</a> entry!</li>
 </ul>
@@ -197,7 +198,7 @@ will be detected in the following line:</li>
 <li>Escapes (e.g. <code>\"</code>) are ignored, so the following line will produce
 an error:</li>
 </ul>
-<pre class="&lt;!---c--&gt;"><code>    printf(&quot;\&quot;&quot;);</code></pre>
+<pre><code>    printf(&quot;\&quot;&quot;);</code></pre>
 <h4 id="obfuscation">Obfuscation</h4>
 <p><a href="../../years.html">IOCCC entries</a> already contain entries without digits, control-flow
 keywords and certain operators in their source. This entry has an
@@ -273,10 +274,10 @@ at least two bytes long.</p></li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/incorrect.quote-esc.c">incorrect.quote-esc.c</a> - example source with incorrect quote escape</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/incorrect.single.quote.c">incorrect.single.quote.c</a> - example source with incorrect single quote</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/incorrect.txt">incorrect.txt</a> - example source with incorrect text</li>
-<li><a href="2012_zeitak.tar.bz2">2012_zeitak.tar.bz2</a> - download entry tarball</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>
+<li><a href="2012_zeitak.tar.bz2">2012_zeitak.tar.bz2</a> - download entry tarball</li>
 <li><a href="index.html">index.html</a> - this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/README.md">README.md</a> - markdown source for this web page</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/.entry.json">.entry.json</a> - description of entry in JSON</li>