docs: add Geo Testnet Faucet documentation and sidebar entry

Author: marcusrein

docs/docs/faucet.md

@@ -0,0 +1,26 @@
+---
+title: Geo Testnet Faucet
+description: Request GEO tokens for development and testing on the Geo Testnet.
+---
+
+# 🪙 Geo Testnet Faucet
+
+Need some GEO testnet tokens to start building with Hypergraph? Use our public faucet to quickly top-up your wallet.
+
+[**Open the Geo Faucet**](https://faucet.conduit.xyz/geo-test-zc16z3tcvf)
+
+## How it works
+
+1. Switch your wallet/network to **Geo Testnet**.
+2. Navigate to the faucet URL above and connect your wallet.
+3. Click **Request tokens**. You should receive GEO in a few seconds.
+
+That's it! You can now use the test tokens with any Hypergraph-powered app running on the Geo Testnet.
+
+> Tip: If you run out of test tokens, come back to the faucet and request again (rate-limited to prevent abuse).
+
+---
+
+### Edit on GitHub  :bust_in_silhouette:
+
+[✏️ Improve this page](https://github.com/graphprotocol/hypergraph/edit/main/docs/docs/faucet.md) 

docs/sidebars.js

@@ -18,6 +18,7 @@ const sidebars = {
   // By default, Docusaurus generates a sidebar from the docs folder structure
   docs: [
     { type: 'doc', id: 'quickstart', label: '🚀 Quickstart' },
+    { type: 'doc', id: 'faucet', label: '🪙 Testnet Faucet' },
     { type: 'doc', id: 'key-features', label: '🌟 Key Features' },
     { type: 'doc', id: 'core-concepts', label: '🧠 Core Concepts' },
     { type: 'doc', id: 'api-reference', label: '📚 API Reference' },