chore: update dependencies and improve crowdfund contract logic
- Updated @meshsdk/core and related packages to version 1.9.0-beta.72. - Upgraded Next.js to version 15.5.0. - Refactored offchain.ts to add fallback values for CrowdfundDatum properties. - Enhanced transaction debugging by logging parameters before completion. - Changed txOutInlineDatumValue to specify JSON format. - Updated crowdfund.ts to use MPubKeyAddress and Bool types instead of PubKeyAddress and Boolean.