feat: hooks examples

[ivaylonikolov7]

Description:

Expose hooks types in the public API and add comprehensive examples demonstrating hooks functionality.

• Export hooks types (FungibleHookCall, FungibleHookType, HookCall, NftHookCall, NftHookType, LambdaSStoreTransaction) from lib.rs
• Add account_hooks.rs example demonstrating account creation with hooks
• Add contract_hooks.rs example demonstrating contract hooks usage
• Add lambda_sstore.rs example demonstrating lambda storage slot operations
• Update transfer_with_hooks.rs example

Fixes #1111

Notes for reviewer:

This PR makes hooks-related types publicly available in the SDK and provides working examples for:

• Account hooks (creating accounts with hook specifications)
• Contract hooks (attaching hooks to contracts)
• Lambda storage operations (using LambdaSStoreTransaction)

All examples follow the existing pattern in the codebase and include proper error handling.

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)