build index.html for all winners

Updated manifest as per recent file changes.

Updated winner `.winner.json` to reflect the manifest changes.

Added [bin/all_run.sh](bin/all_run.sh) tool to run a command over
all winning entries.

These tools had slight improvements in the help usage message:

* bin/gen-author.sh VERSION="1.3.1 2024-01-16"
* bin/gen-inventory.sh VERSION="1.0.1 2024-01-16"
* bin/pandoc_wrapper.sh VERSION="1.3.1 2024-01-16"
* bin/subst.default.sh VERSION="1.1.1 2024-01-16"
* bin/subst.winner-index.sh VERSION="1.1.1 2024-01-16"

The `bin/readme2index.sh` tool was improved so that
if the `index.html` file exists and the tool forms
the exact same content, then the file `index.html`
file is NOT touched.

* bin/readme2index.sh VERSION="1.1 2024-01-16"

We used the following command to generate `index.html` files
for all winning entries:

```sh
bin/all_run.sh -v 3 bin/readme2index.sh
```

NOTE: We have not (yet) built HTML files above the winner directory
level (e.g., no year level nor top level HTML), nor have be built
non-index HTML files for winners.

NOTE: By default we are running `pandoc(1)` with:

```
--fail-if-warnings=true
```

This means that any problems with markdown to HTML
generates an error.  This is done to be sure that
the HTML conversion is clean.

We had to fix the following `README.md` files:

* `2000/rince/README.md`

The reference [^2] was never used.  We made a guess that [^2] applies
to the same spot as [^1].  Perhaps there is a better spot where
[^2] applies?

NOTE: For every reference, there MUST be some place where that
reference is used.

* 2012/vik/README.md

The string "$...$" is assumed to be a TeX encoded string.

NOTE: Every "$..$" needs to be backslashed as in "\$..\$".

* 2018/burton1/README.md

The reference [2] was duplicated.  We changed the
second [2] to [3].

NOTE: Every reference needs to have a unique number.

* 2020/carlini/README.md

The string "$...$" is assumed to be a TeX encoded string.

NOTE: Every "$..$" needs to be backslashed as in "\$..\$".

We also found 2 errors in the `author/author_handle.json` file set:

* author/Anonymous_2001.json

The `author/Anonymous_2001.json` file was missing.

* author/Jari_Arkko.json

The winner ID for `1989_jar.1` had a typo.

2012/vik/README.md

@@ -111,9 +111,9 @@ additional chunks are copied into the resulting image.
 For some reason the chocolate image seems to have some special properties.
 Apart from being quite big and a little bit noisy, it appears that when embedded
 into another image and extracted, the bitmap data is also a valid
-[brain$#@$](https://en.wikipedia.org/wiki/Brainfuck) program. It is of course
+[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program. It is of course
 possible to get the bitmap data from the extracted image, and run it through any
-of the previous winning brain$#@$ interpreters, but I thought it would be easier
+of the previous winning brain\$#@\$ interpreters, but I thought it would be easier
 to include an interpreter in the program to avoid the hassle:
 
 ```sh
@@ -122,7 +122,7 @@ to include an interpreter in the program to avoid the hassle:
 ```
 
 It is of course also possible to embed a
-[brain$#@$](https://en.wikipedia.org/wiki/Brainfuck) program as a text file
+[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program as a text file
 (as explained above) and decode it, e.g.:
 
 ```sh
@@ -172,7 +172,7 @@ program to crash.
 
 Since a lot of care was taken to keep the code simple, it turned out to be
 quite easy to extend functionality. I did include a small
-[brain$#@$](https://en.wikipedia.org/wiki/Brainfuck) after I
+[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) after I
 realized that the chocolate image had some interesting properties.
 
 But there is more functionality I added that didn't fit within the size
@@ -181,9 +181,9 @@ format source code based on a PNG image. So the format of the program is
 actually done by the program itself.
 
 And to be honest, the chocolate image did not have a
-[brain$#@$](https://en.wikipedia.org/wiki/Brainfuck) program
+[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program
 embedded to begin with. I added functionality to the program to embed a
-brain$#@$ into a PNG image and used it to create the image provided with
+brain\$#@\$ into a PNG image and used it to create the image provided with
 the entry.
 
 I also added a method to analyze PNG images, to print the size and format,