feat: always initialize git repository

This fixes issues where alternative tools that don't trigger the init via sshcommand - such as git-http-backend - are not able to setup applications correctly.

Note that those apps could always manually trigger git:initialize if desired, but if the app already exists, then this should already _just work_ without that extra initialization.

plugins/git/post-create

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_AVAILABLE_PATH/git/functions"
+
+trigger-git-post-create() {
+  declare desc="initializes an app with the correct git repository structure"
+  declare trigger="post-create"
+  declare APP="$1"
+
+  fn-git-create-hook "$APP"
+}
+
+trigger-git-post-create "$@"