made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/compiler/zig.vim

@@ -0,0 +1,24 @@
+" Vim compiler file
+" Compiler: Zig Compiler
+" Upstream: https://github.com/ziglang/zig.vim
+
+if exists("current_compiler")
+    finish
+endif
+let current_compiler = "zig"
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+" a subcommand must be provided for the this compiler (test, build-exe, etc)
+if has('patch-7.4.191')
+    CompilerSet makeprg=zig\ \$*\ \%:S
+else
+    CompilerSet makeprg=zig\ \$*\ \"%\"
+endif
+
+" TODO: improve errorformat as needed.
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+" vim: tabstop=8 shiftwidth=4 softtabstop=4 expandtab