scaffold: manifest v3, stub content script and popup, placeholder icons

manifest.json

@@ -0,0 +1,42 @@
+{
+  "manifest_version": 3,
+  "name": "Outlook Relook",
+  "version": "0.1.0",
+  "description": "Minimalist reskin for Outlook Web App — clean themes, less clutter, more email.",
+  "permissions": ["storage", "activeTab"],
+  "content_scripts": [
+    {
+      "matches": ["https://outlook.office.com/*", "https://outlook.office365.com/*"],
+      "css": ["themes/base.css"],
+      "js": [
+        "content/settings-defaults.js",
+        "content/selectors.js",
+        "content/observer.js",
+        "content/behavior.js",
+        "content/keyboard.js",
+        "content/injector.js",
+        "content/content.js"
+      ],
+      "run_at": "document_idle"
+    }
+  ],
+  "action": {
+    "default_popup": "popup/popup.html",
+    "default_icon": {
+      "16": "icons/icon-16.png",
+      "48": "icons/icon-48.png",
+      "128": "icons/icon-128.png"
+    }
+  },
+  "icons": {
+    "16": "icons/icon-16.png",
+    "48": "icons/icon-48.png",
+    "128": "icons/icon-128.png"
+  },
+  "web_accessible_resources": [
+    {
+      "resources": ["themes/*.css"],
+      "matches": ["https://outlook.office.com/*", "https://outlook.office365.com/*"]
+    }
+  ]
+}