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/connection-manager/index.js

@@ -474,7 +474,7 @@ async function renderDetailsContent(detailsContent) {
     }
 }
 
-(async function () {
+export async function init() {
     extension_settings.connectionManager = extension_settings.connectionManager || structuredClone(DEFAULT_SETTINGS);
 
     for (const key of Object.keys(DEFAULT_SETTINGS)) {
@@ -824,4 +824,4 @@ async function renderDetailsContent(detailsContent) {
             return JSON.stringify(profile);
         },
     }));
-})();
+}