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>

.gemini/settings.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "gitea-mcp": {
+      "url": "https://gitea.mcp.snusxd.site/mcp",
+      "type": "http"
+    }
+  }
+}