remove vim-plug, use native vim packages for copilot

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.local/bin/git-ci

@@ -1,10 +0,0 @@
-#!/bin/bash
-if [ $# -eq 0 ]; then
-  git commit -v
-else
-  if [ "$1" = "--amend" ]; then
-    git commit -v --amend
-  else
-			git commit -m "$*"
-  fi
-fi

.local/bin/git-ci

@@ -0,0 +1 @@
+/Users/syui/dotfiles/.local/bin/git-ci