Initial FlareSolverr Cloudron package

- Add CloudronManifest.json with app metadata
- Create Dockerfile with multi-stage build
- Install Google Chrome (Chrome for Testing) since Ubuntu Noble doesn't have chromium package
- Install required Chrome dependencies (libatk, libgtk, etc.)
- Add start.sh script with Xvfb setup for headless Chrome
- Copy entire Chrome installation directory for proper resource access
- Add .gitignore and update README with installation instructions

.gitignore

@@ -0,0 +1,18 @@
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Docker
+*.tar
+*.gz
+
+# Logs
+*.log
+