Migrate built-in extensions to use manifest-based activate hooks (#5435)

* Convert jQuery/IIFE wrappers to exported init() functions and register activate hooks in 8 extension manifests

* Convert remaining extensions to exported init() with activate hooks and await initExtensions()

- Convert jQuery/IIFE wrappers to exported init() functions in expressions, memory, quick-reply, regex, stable-diffusion, translate, tts, and vectors extensions

- Register init functions as activate hooks in extension manifests

- Properly await async initExtensions() in firstLoadInit()

* Fix eslint

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Co-authored-by: Cohee <18619528+Cohee1207@users.noreply.github.com>

public/scripts/extensions/tts/index.js

@@ -1531,7 +1531,7 @@ async function initVoiceMapInternal(unrestricted) {
     updateVoiceMap();
 }
 
-jQuery(async function () {
+export async function init() {
     async function addExtensionControls() {
         const settingsHtml = $(await renderExtensionTemplateAsync('tts', 'settings'));
         $('#tts_container').append(settingsHtml);
@@ -1619,4 +1619,4 @@ jQuery(async function () {
     }));
 
     document.body.appendChild(audioElement);
-});
+}