fix(git): configure gh as default credential helper

Ensure git uses GitHub CLI for HTTPS authentication by default so fetch/push work consistently without manual credential overrides.

Made-with: Cursor

Author: ChipWolf

home/dot_gitconfig

@@ -34,6 +34,8 @@
   tool = vimdiff
 [pull]
   rebase = true
+[credential]
+  helper = !gh auth git-credential
 [include]
   path = ~/.gitconfig.overrides
 [init]