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

gitportable/usr/share/vim/vim91/spell/yi.vim

@@ -0,0 +1,10 @@
+" For Yiddish capitals should not be checked.  But only change the
+" 'spellcapcheck' option when it is not at its default value.
+let s:spc = &l:spc
+setlocal spc&
+if s:spc == &l:spc
+  setlocal spc=
+else
+  let &l:spc = s:spc
+endif
+unlet s:spc