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.

manifest.json

@@ -0,0 +1,56 @@
+{
+    "manifest_version": 3,
+    "name": "Chrome Extension Template",
+    "description": "A Chrome Extension created using a template",
+    "version": "0.0.1",
+    "author": "Clyde D'Souza",
+    "icons": {
+      "16": "icons/icon16.png",
+      "48": "icons/icon48.png",
+      "128": "icons/icon128.png"
+    },
+    "omnibox": { 
+      "keyword" : "@@" 
+    },    
+    "permissions": [
+      "storage"
+    ],
+    "chrome_url_overrides" : {
+      "newtab": "newtab.html"
+    },
+    "options_ui": {
+      "page": "options.html",
+      "open_in_tab": true
+    },
+    "background": {
+      "service_worker": "background.js"
+    },
+    "content_scripts": [{
+      "matches": ["*://github.com/*"],
+      "js": ["content_scripts.js"]
+    }],
+    "action": {
+      "default_popup": "popup.html",
+      "default_title": "Open template popup"
+    },
+    "commands": {
+      "turn-on": {
+        "suggested_key": {
+          "default": "Alt + Shift + M"
+        },
+        "description": "Adds an ON badge to the action icon."
+      },
+      "turn-off": {
+        "suggested_key": {
+          "default": "Alt + Shift + N"
+        },
+        "description": "Adds an OFF badge to the action icon."
+      },
+      "_execute_action": {
+        "suggested_key": {
+          "default": "Alt + Shift + L"
+        }
+      }
+    }
+  }
+