feat(extension): add VS Code extension with kanban board interface

- Complete VS Code extension with React-based kanban board UI
- MCP integration for real-time Task Master synchronization
- Professional CI/CD workflows for marketplace publishing
- Comprehensive configuration system with user preferences
- ShadCN UI components with VS Code theme integration
- Drag-and-drop task management with status transitions
- AI-powered task features via MCP protocol
- Robust error handling and connection management
- Multi-registry publishing (VS Code Marketplace + Open VSX)
- Security audit completed with hardcoded paths removed

BREAKING CHANGE: Extension requires publisher setup and marketplace keys

Publisher and extension naming decisions required:
- Update publisher field from placeholder 'DavidMaliglowka'
- Choose unique extension name (currently 'taskr-kanban')
- Select appropriate extension icon
- Configure CI secrets (VSCE_PAT, OVSX_PAT) for publishing

See apps/extension/docs/ for detailed setup instructions

apps/extension/eslint.config.mjs

@@ -0,0 +1,28 @@
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+
+export default [{
+    files: ["**/*.ts"],
+}, {
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 2022,
+        sourceType: "module",
+    },
+
+    rules: {
+        "@typescript-eslint/naming-convention": ["warn", {
+            selector: "import",
+            format: ["camelCase", "PascalCase"],
+        }],
+
+        curly: "warn",
+        eqeqeq: "warn",
+        "no-throw-literal": "warn",
+        semi: "warn",
+    },
+}];