feat: comprehensive console capture and offline mode support

Major enhancements to browser automation and debugging capabilities:

**Console Capture Features:**
- Add console output file option (CLI, env var, session config)
- Enhanced CDP console capture for service worker messages
- Browser-level security warnings and mixed content errors
- Network failure and loading error capture
- All console contexts written to structured log files
- Chrome extension for comprehensive console message interception

**Offline Mode Support:**
- Add browser_set_offline tool for DevTools-equivalent offline mode
- Integrate offline mode into browser_configure tool
- Support for testing network failure scenarios and service worker behavior

**Extension Management:**
- Improved extension installation messaging about session persistence
- Console capture extension with debugger API access
- Clear communication about extension lifecycle to MCP clients

**Technical Implementation:**
- CDP session management across multiple domains (Runtime, Network, Security, Log)
- Service worker context console message interception
- Browser context factory integration for offline mode
- Pure Chromium configuration for optimal extension support

All features provide MCP clients with powerful debugging capabilities
equivalent to Chrome DevTools console and offline functionality.

console-capture-extension/manifest.json

@@ -0,0 +1,37 @@
+{
+  "manifest_version": 3,
+  "name": "Console Capture Extension",
+  "version": "1.0.0",
+  "description": "Captures comprehensive console messages including browser-level warnings and errors",
+  
+  "permissions": [
+    "debugger",
+    "tabs",
+    "activeTab",
+    "storage"
+  ],
+  
+  "background": {
+    "service_worker": "background.js",
+    "type": "module"
+  },
+  
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["content.js"],
+      "run_at": "document_start"
+    }
+  ],
+  
+  "host_permissions": [
+    "<all_urls>"
+  ],
+  
+  "icons": {
+    "16": "icon-16.png",
+    "32": "icon-32.png", 
+    "48": "icon-48.png",
+    "128": "icon-128.png"
+  }
+}