added Makefile and remaining build infrastructure

scripts/list-mods

@@ -0,0 +1,17 @@
+#!/usr/bin/perl
+# list-mods - Lists out the contents of the modlist.txt to just show the mod JAR names.
+# AGRB 1/24/2023
+
+die "Usage: $0 directory-name\n" if $#ARGV < 0;
+my $dir = $ARGV[0];
+die "$0: $dir is not a directory\n" unless -d $dir;
+die "$0: $dir does not contain a modlist.txt\n" unless -f "$dir/modlist.txt";
+open MODLIST, "<$dir/modlist.txt" or die "$0: unable to open $dir/modlist.txt";
+while (<MODLIST>) {
+    chomp;
+    next if /^\s*#/;
+    ($modjar, $url) = split(/\|/);
+    print "$modjar\n"
+}
+close MODLIST;
+exit 0;