refactor: rename module to pipely and migrate web UI to MUI

- Rename Go module from onixbyte.com/message-converter-manifest to onixbyte.com/pipely
- Replace shadcn UI with Material UI components across all pages
- Add axios-based API client in shared/web-client with credentials management
- Organise API calls into feature modules: auth, devices, deployments, artefacts, users
- Add .env.example with VITE_API_BASE_URL pointing to pipely.onixbyte.com
- Fix deprecated FormEvent → MouseEvent in dialog submit handlers

web/tsconfig.app.json

@@ -22,8 +22,13 @@
     "erasableSyntaxOnly": true,
     "noFallthroughCasesInSwitch": true,
     "paths": {
-      "@/*": ["./src/*"]
+      "@/*": ["./src/*"],
+      "@/components/*": ["./src/components/*"],
+      "@/lib/*": ["./src/lib/*"],
+      "@/hooks/*": ["./src/hooks/*"],
+      "@/api/*": ["./src/api/*"],
+      "@/shared/*": ["./src/shared/*"]
     }
   },
   "include": ["src"]
-}
+}