improve years.html and fix links to year-level compressed tarballs

Fixed links to year level compressed tarballs.

Added an "Inventory" of year-level compressed tarballs to the
generated `years.html` web page.

In `bin/gen-years.sh` changed VERSION from "1.0.3 2024-03-26"
to "1.1 2024-03-30".

In `bin/output-year-index.sh` changed VERSION from "1.1.2 2024-03-26"
to "1.2 2024-03-30".

Added `inc/topnav.empty.html` for an empty narrow topnav bar.

Changed references from "topnav=." to "topnav=empty" in `inc/md2html.cfg`.

Removed top level `ioccc.tar.bz2` compressed tarball.  NOTE: Sorry
(tm Canada 🇨🇦) to remove the top level `ioccc.tar.bz2` file.  We
will look into [Git Large File Storage [Git-LFS](https://git-lfs.com/).
If Git-LFS works well and does not have undesirable side effects,
we will consider restoring `ioccc.tar.bz2`.

Removed top level Makefile rules for "untar_all_tarball" and
"form_all_tarball".  Removed `bin/tar-all.sh`.

Added `make gen_status` to `make quick_www` and `make www` in the
top level `Makefile`.

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

bin/output-year-index.sh

@@ -108,7 +108,7 @@ shopt -s globstar	# enable ** to match all files and zero or more directories an
 
 # set variables referenced in the usage message
 #
-export VERSION="1.1.2 2024-03-26"
+export VERSION="1.2 2024-03-30"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -552,7 +552,7 @@ fi
 {
     echo "# <a name=inventory></a><a name=$YYYY></a>Winning Entries of $YYYY - The $ORDINAL IOCCC"
     echo
-    echo "**Download IOCCC** [$YYYY entry source]($YYYY/ioccc.$YYYY.tar.bz2)"
+    echo "**Download** all [$YYYY IOCCC entry source]($YYYY/$YYYY.tar.bz2)"
     echo
 } | if [[ -z $NOOP ]]; then
     cat >> "$TMP_FILE"