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

---------

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

public/scripts/extensions/stable-diffusion/index.js

@@ -5470,7 +5470,7 @@ function registerFunctionTool() {
     });
 }
 
-jQuery(async () => {
+export async function init() {
     await addSDGenButtons();
 
     const getSelectEnumProvider = (id, text) => () => Array.from(document.querySelectorAll(`#${id} > [value]`)).map(x => new SlashCommandEnumValue(x.getAttribute('value'), text ? x.textContent : null));
@@ -5977,4 +5977,4 @@ jQuery(async () => {
             t`Character's negative Image Generation prompt prefix`,
         );
     }
-});
+}