feat: add close empty spl-token accounts transaction

[thrishank]

Pull Request Description

Changes Made

This PR adds the following changes:

• all the close instruction for empty token accounts
• this instruction closes the token account and reclaim's the rent

Implementation Details

• createCloseAccountInstruction from @solana/spl-token library to close the spl-token account

Transaction executed by agent

Example transaction:
transaction

Prompt Used

close my empty token accounts

Checklist

• I have tested these changes locally
• I have updated the documentation
• I have added a transaction link
• I have added the prompt used to test it

[arihantbansal]

pls remove.

[arihantbansal]

I think only USDC exception is fine since that's the prevalent stablecoin on Solana

[arihantbansal]

Please pull latest changes from main and merge them. Also, run pnpm run lint:fix & pnpm run format.

[arihantbansal]

Please add an action file in https://github.com/sendaifun/solana-agent-kit/tree/main/src/actions

[thrishank]

@thearyanag @arihantbansal added the action file. This PR focuses on closing only empty ATA .
I’m considering building another tool that allows users to select specific tokens they want to get rid off, even if the accounts aren't empty. We can swap all this tokens to USDC(can take input from user) if there is a quote on jup or burn these tokens and reclaim the rent. This is similar to sol incinerator tokens feature. What do you guys think ?