feat: add context menu and keyboard shortcut entry points

manifest.json

@@ -4,7 +4,7 @@
   "manifest_version": 2,
   "author": "Mathew Guest <mat@zavage.net>",
   "homepage_url": "https://zavage-software.com/portfolio/search-with-ChatGPT",
-  "version": "1.0",
+  "version": "1.1",
   "icons": {
     "16": "icons/powered-by-openai-icon-16x16.png",
     "32": "icons/powered-by-openai-icon-32x32.png",
@@ -22,6 +22,31 @@
       }
     }
   },
+  "permissions": [
+    "storage",
+    "menus",
+    "activeTab"
+  ],
+  "background": {
+    "scripts": [
+      "background/background.js"
+    ],
+    "type": "module",
+    "persistent": false
+  },
+  "options_ui": {
+    "page": "options/options.html",
+    "open_in_tab": false,
+    "browser_style": false
+  },
+  "commands": {
+    "ask-chatgpt": {
+      "suggested_key": {
+        "default": "Alt+Shift+G"
+      },
+      "description": "Ask ChatGPT about the selected text"
+    }
+  },
   "chrome_settings_overrides": {
     "search_provider": {
       "name": "ChatGPT",