Add support for custom headers and migrate from legacy auth

- Introduced CustomHeaders component for managing custom headers.
- Updated Sidebar to include CustomHeaders component.
- Enhanced useConnection hook to handle custom headers and legacy auth migration.
- Added tests for custom headers functionality.
- Updated package.json and package-lock.json for new dependencies.

client/package.json

@@ -33,6 +33,7 @@
     "@radix-ui/react-popover": "^1.1.3",
     "@radix-ui/react-select": "^2.1.2",
     "@radix-ui/react-slot": "^1.1.0",
+    "@radix-ui/react-switch": "^1.2.6",
     "@radix-ui/react-tabs": "^1.1.1",
     "@radix-ui/react-toast": "^1.2.6",
     "@radix-ui/react-tooltip": "^1.1.8",
@@ -69,6 +70,7 @@
     "globals": "^15.9.0",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
+    "jest-fixed-jsdom": "^0.0.9",
     "postcss": "^8.5.6",
     "tailwindcss": "^3.4.13",
     "tailwindcss-animate": "^1.0.7",