Use monaco for the git hook editor (#13552)

Migrate git hook editor to monaco, replacing CodeMirror. Had to do a few
refactors to make the monaco instantiation generic enough to be of use.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

web_src/js/index.js

@@ -23,7 +23,7 @@ import createDropzone from './features/dropzone.js';
 import initTableSort from './features/tablesort.js';
 import ActivityTopAuthors from './components/ActivityTopAuthors.vue';
 import {initNotificationsTable, initNotificationCount} from './features/notification.js';
-import {createCodeEditor} from './features/codeeditor.js';
+import {createCodeEditor, createMonaco} from './features/codeeditor.js';
 import {svg, svgs} from './svg.js';
 import {stripTags} from './utils.js';
 
@@ -1732,15 +1732,10 @@ function initUserSettings() {
   }
 }
 
-function initGithook() {
-  if ($('.edit.githook').length === 0) {
-    return;
-  }
-
-  CodeMirror.autoLoadMode(CodeMirror.fromTextArea($('#content')[0], {
-    lineNumbers: true,
-    mode: 'shell'
-  }), 'shell');
+async function initGithook() {
+  if ($('.edit.githook').length === 0) return;
+  const filename = document.querySelector('.hook-filename').textContent;
+  await createMonaco($('#content')[0], filename, {language: 'shell'});
 }
 
 function initWebhook() {
@@ -2517,7 +2512,6 @@ $(document).ready(async () => {
   initEditForm();
   initEditor();
   initOrganization();
-  initGithook();
   initWebhook();
   initAdmin();
   initCodeView();
@@ -2575,6 +2569,7 @@ $(document).ready(async () => {
     initServiceWorker(),
     initNotificationCount(),
     renderMarkdownContent(),
+    initGithook(),
   ]);
 });