Remove Settings and Setup pages along with their tests and related API services

- Deleted Settings.tsx and Setup.tsx pages, which included functionality for changing passwords and setting up an admin account.
- Removed associated test files for Setup page.
- Eliminated API service definitions related to proxy hosts, remote servers, import functionality, and health checks.
- Cleaned up mock data and test setup files.
- Removed configuration files for TypeScript, Vite, and Tailwind CSS.
- Deleted scripts for testing coverage, release management, Dockerfile validation, and Python compilation checks.
- Removed Sourcery pre-commit wrapper script.

.gitignore

@@ -1,70 +0,0 @@
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-*.so
-.Python
-.venv/
-venv/
-env/
-ENV/
-.pytest_cache/
-.coverage
-*.cover
-.hypothesis/
-htmlcov/
-
-# Node/Frontend
-frontend/node_modules/
-backend/node_modules/
-frontend/dist/
-frontend/coverage/
-frontend/.vite/
-frontend/*.tsbuildinfo
-
-# Go/Backend
-backend/api
-backend/*.out
-backend/coverage/
-backend/coverage.*.out
-
-# Databases
-*.db
-*.sqlite
-*.sqlite3
-backend/data/*.db
-backend/cmd/api/data/*.db
-
-# IDE
-.vscode/
-.idea/
-*.swp
-*.swo
-*~
-.DS_Store
-*.code-workspace
-
-# Logs
-*.log
-logs/
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Environment
-.env
-.env.*
-!.env.example
-
-# OS
-Thumbs.db
-
-# Caddy
-backend/data/caddy/
-
-# Docker
-docker-compose.override.yml
-
-# Testing
-coverage/
-*.xml