Added basics/counter/poseidon

[Memewtoo]

• Added implementation of counter 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

[Memewtoo]

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!

Hi, I've completed the steps for technical implementation, you can see the commit here and the reference of the steps on the image below.

Actually for there's a minor warning on the transcribed solana program by running cargo clippy but I haven't applied the suggested changes as tampering with the transcribed program would defeat the purpose of learning and understanding how to use poseidon properly.