Added basics/account-data/poseidon

[Memewtoo]

• Added implementation of account-data example for Poseidon framework
• Follows original anchor program structure for consistency
• Properly documented Poseidon framework making it easily readable for everyone
• pnpm package manager support

[heyAyushh]

Thanks for your submission! To verify the technical implementation, please complete these steps:

1. Merge the main branch into your PR to get the latest updates
2. Run pnpm fix at the project root for consistent code style
3. Ensure your implementation includes:
   • Transpiled Anchor program in the programs folder
   • TypeScript files in the ts-programs folder
4. Run poseidon sync to synchronize program ID and keys
5. Run cargo fmt and cargo clippy for Rust code quality
6. Push your changes

Please note: This review is to verify technical completeness of the submission

Let me know once you've completed these steps and I'll review again. Thanks!

[Memewtoo]

Hi @heyAyushh, I've done the format fixes for this PR. You can see the commit here and the reference of what I've done in the image below.