feat(e2e): enhance end-to-end testing setup with new scripts and capture cases

- Updated package.json to include new E2E scripts for execution and snapshot capturing.
- Added new capture cases for the "new-project-modal" and "start-new-chat" functionalities in the E2E tests.
- Increased wait times in session detail captures to ensure elements are fully loaded before interactions.
- Introduced new shell scripts for starting the server and capturing snapshots, improving the E2E testing workflow.
- Updated NewChatModal and SessionsTab components to include data-testid attributes for better test targeting.

package.json

@@ -35,7 +35,9 @@
     "typecheck": "tsc --noEmit",
     "test": "vitest --run",
     "test:watch": "vitest",
-    "e2e": "./scripts/e2e.sh"
+    "e2e": "./scripts/e2e/exec_e2e.sh",
+    "e2e:start-server": "./scripts/e2e/start_server.sh",
+    "e2e:capture-snapshots": "./scripts/e2e/capture_snapshots.sh"
   },
   "dependencies": {
     "@anthropic-ai/claude-code": "^1.0.98",