feat: Implement Gogh Theme Engine with options page, theme parsing, and semantic theme derivation

We're cooked. <skull emoji>

- Added options page for YAML palette editing, live color preview, and diagnostics.
- Implemented theme engine to parse Gogh YAML palettes and derive semantic themes.
- Configured TypeScript and Vite for building the extension.
- Created new tab and popup HTML pages with corresponding scripts and styles.
- Established storage management for user configurations in Chrome storage.
- Added icons for the extension and updated manifest for MV3 compatibility.

content_scripts/index.js

@@ -0,0 +1,13 @@
+import { getStorage } from "../common/storage";
+import { CHROME_SYNC_STORAGE_KEY, PRESET_CONFIGURATION } from "../common/settings";
+
+function loadAndDisplayStorageValue(result) {
+    const savedConfiguration = result || PRESET_CONFIGURATION;
+    const storageValue = savedConfiguration["storageValue"];    
+    console.info("Storage value is", storageValue);
+}
+
+window.onload = function() {
+    console.info("Content script loaded");
+    getStorage(CHROME_SYNC_STORAGE_KEY, loadAndDisplayStorageValue); 
+}