docs(learn): add section for testnet (#619)

Add section in learn for users wondering how to stake

task: https://app.asana.com/0/1206684215872507/1206862901604363/f

docs/site/docs/learn/omni/testnet.md

@@ -0,0 +1,27 @@
+---
+sidebar_position: 7
+---
+
+# Omni Omega Testnet
+
+During the Omni Omega Testnet, users will be able to delegate restaked **\$ETH** to the Omni Operators and can participate on missions in the [Omni Mission Center](https://missions.omni.network/).
+
+## Omni Missions Center
+
+Take part in Omni Missions to help drive Omni forward and get rewards! Read more on the [mission center dashboard](https://missions.omni.network/).
+
+## Delegating \$ETH
+
+:::warning EigenLayer Still Migrating to Holesky
+
+The URL for the EignLayer Dashboard and a list of the supported Omni Operators will be added here soon.
+
+:::
+
+You can delegate testnet **\$ETH** to securing Omni through EigenLayer through the EigenLayer dashboard. Once there you can:
+
+1. Have Holesky as a network to your browser wallet, funded with Holesky **\$ETH**. [Read more on how here](https://www.coingecko.com/learn/holesky-testnet-eth).
+2. Swap Holesky **\$ETH** for any of the [EigenLayer supported restaking tokens](https://docs.eigenlayer.xyz/eigenlayer/restaking-guides/restaking-user-guide/stage-2-testnet/obtaining-testnet-eth-and-liquid-staking-tokens-lsts).
+3. Connect your wallet to the EigenLayer dashboard.
+4. Restake your restaking tokens to any of the Omni Operators.
+5. 🎉 You are helping secure the Omni Omega Testnet! 🎉