feat: Initial Material You client implementation

Implemented a Material You (Material 3) client for the bonch-open-api.
- Added API client with axios
- Added Zustand store for API config and user data
- Added Login and Profile pages
- Set up routing with react-router-dom
- Added global styles with Material 3 tokens

Co-Authored-By: Claude <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}