add git alias for worktree workflows

.local/bin/git-cln

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+sh ~/.local/bin/git-worktree-setup.sh "$@"

.local/bin/git-worktree-setup.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -e
+
+url=$1
+basename=${url##*/}
+name=${2:-${basename%.*}}
+
+mkdir -p "$name"
+cd "$name"
+
+git clone --bare "$url" .bare
+echo "gitdir: ./.bare" > .git
+
+git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
+git fetch origin
+
+default_branch=$(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')
+git worktree add "$default_branch"
+
+osascript -e "tell application \"Terminal\" to do script \"cd '$PWD/$default_branch' && clear\" in front window"