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

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

@@ -0,0 +1,47 @@
+vim9script
+
+# Language:           ConTeXt typesetting engine
+# Maintainer:         Nicola Vitacolonna <nvitacolonna@gmail.com>
+# Former Maintainers: Nikolai Weibull <now@bitwi.se>
+# Contributors:       Enno Nagel
+# Last Change:        2024 Mar 29
+#                     2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
+
+if exists("g:current_compiler")
+  finish
+endif
+
+import autoload '../autoload/context.vim'
+
+g:current_compiler = 'context'
+
+if get(b:, 'context_ignore_makefile', get(g:, 'context_ignore_makefile', 0)) ||
+  (!filereadable('Makefile') && !filereadable('makefile'))
+  var makeprg =  join(context.ConTeXtCmd(shellescape(expand('%:p:t'))), ' ')
+  execute 'CompilerSet makeprg=' .. escape(makeprg, ' ')
+else
+  g:current_compiler = 'make'
+endif
+
+const context_errorformat = join([
+  "%-Popen source%.%#> %f",
+  "%-Qclose source%.%#> %f",
+  "%-Popen source%.%#name '%f'",
+  "%-Qclose source%.%#name '%f'",
+  "tex %trror%.%#error on line %l in file %f: %m",
+  "%Elua %trror%.%#error on line %l in file %f:",
+  "%+Emetapost %#> error: %#",
+  "%Emetafun%.%#error: %m",
+  "! error: %#%m",
+  "%-C %#",
+  "%C! %m",
+  "%Z[ctxlua]%m",
+  "%+C<*> %.%#",
+  "%-C%.%#",
+  "%Z...%m",
+  "%-Zno-error",
+  "%-G%.%#"], ",")
+
+execute 'CompilerSet errorformat=' .. escape(context_errorformat, ' ')
+
+# vim: sw=2 fdm=marker