feat: add Solayer staking tool (#116)

# Pull Request Description

## Related Issue
Fixes # (issue number)

## Changes Made
This PR adds the following changes:
<!-- List the key changes made in this PR -->
- Add staking to Solayer through a Solana Actions/Blink endpoint
- 
  
## Implementation Details
<!-- Provide technical details about the implementation -->
- Added stakeWithSolayer action
- Added stake_with_solayer tool
- Added tool to langchain

## Transaction executed by agent 
<!-- If applicable, provide example usage, transactions, or screenshots
-->
Example transaction:
[https://solscan.io/tx/3jauR9XevrX9BFaz7VicPe3m3Xw3co6SPmCfZsj69WVAdkM8D4M3CkUH3Wayd794tEsmdHJ2zoqEmp7i5eX9L6uE](https://solscan.io/tx/3jauR9XevrX9BFaz7VicPe3m3Xw3co6SPmCfZsj69WVAdkM8D4M3CkUH3Wayd794tEsmdHJ2zoqEmp7i5eX9L6uE)

## Prompt Used
<!-- If relevant, include the prompt or configuration used -->
```
```

## Additional Notes
<!-- Any additional information that reviewers should know -->

## Checklist
- [x] I have tested these changes locally
- [x] I have updated the documentation
- [x] I have added a transaction link
- [ ] I have added the prompt used to test it

README.md

@@ -59,6 +59,7 @@ Anyone - whether an SF-based AI researcher or a crypto-native builder - can brin
    - Lending by Lulo (Best APR for USDC)
    - Send Arcade Games
    - JupSOL staking
+   - Solayer SOL (sSOL)staking
 
 - **Non-Financial Actions**
   - Gib Work for registering bounties
@@ -173,6 +174,15 @@ const signature = await agent.stake(
 );
 ```
 
+### Stake SOL on Solayer
+
+```typescript
+const signature = await agent.restake(
+  1 // amount in SOL to stake
+);
+
+```
+
 ### Send an SPL Token Airdrop via ZK Compression
 
 ```typescript