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.

frontend/src/index.css

@@ -1,45 +0,0 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
-
-@layer utilities {
-  @keyframes slide-in {
-    from {
-      transform: translateX(100%);
-      opacity: 0;
-    }
-    to {
-      transform: translateX(0);
-      opacity: 1;
-    }
-  }
-
-  .animate-slide-in {
-    animation: slide-in 0.3s ease-out;
-  }
-}
-
-:root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  color-scheme: dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #0f172a;
-
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-body {
-  margin: 0;
-  min-width: 320px;
-  min-height: 100vh;
-}
-
-#root {
-  min-height: 100vh;
-}