Rename terminology to industry standard terms

- Grove → Project
- Tree → Package
- Fruit → Artifact
- Graft → Tag
- Cultivate → Upload
- Harvest → Download

Updated across:
- Backend models, schemas, and routes
- Frontend types, API client, and components
- README documentation
- API endpoints now use /project/:project/packages pattern

frontend/src/App.tsx

@@ -1,16 +1,16 @@
 import { Routes, Route } from 'react-router-dom';
 import Layout from './components/Layout';
 import Home from './pages/Home';
-import GrovePage from './pages/GrovePage';
-import TreePage from './pages/TreePage';
+import ProjectPage from './pages/ProjectPage';
+import PackagePage from './pages/PackagePage';
 
 function App() {
   return (
     <Layout>
       <Routes>
         <Route path="/" element={<Home />} />
-        <Route path="/grove/:groveName" element={<GrovePage />} />
-        <Route path="/grove/:groveName/:treeName" element={<TreePage />} />
+        <Route path="/project/:projectName" element={<ProjectPage />} />
+        <Route path="/project/:projectName/:packageName" element={<PackagePage />} />
       </Routes>
     </Layout>
   );