feat: add git branch clean up function ✨

scripts/git-cleanup-branches.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+git rev-parse --git-dir >/dev/null 2>&1 || { echo "Not a git repository." >&2; exit 1; }
+
+default_branch="main"
+git rev-parse --verify refs/heads/main &>/dev/null || default_branch="master"
+
+git branch --merged "$default_branch" \
+  | grep -Fv "$default_branch" \
+  | grep -vF '*' \
+  | grep -vF '+' \
+  | xargs git branch -d \
+  && git fetch \
+  && git remote prune origin \
+  && git branch -v \
+  | grep -F '[gone]' \
+  | grep -vF '*' \
+  | grep -vF '+' \
+  | awk '{print $1}' \
+  | xargs git branch -D