feat: add escrow contract with time-locked dispute resolution

[truthixify]

Description

Introduced an escrow contract to securely hold funds for disputed transactions, with a time-locked release window and dispute resolution flow.

Related Issues

Closes #19

Changes Made

• Implemented escrow.rs contract to lock funds during disputes.
• Added functions for dispute initiation, resolution, and fund release.
• Integrated time-lock mechanism for automatic release after dispute window.
• Emitted events for all escrow actions (lock, dispute, resolve, release).
• Added tests for fund locking/releasing, dispute lifecycle, and edge cases.

How to Test

1. Deploy the escrow.rs contract.
2. Lock funds in escrow for a test transaction.
3. Initiate a dispute and verify funds remain locked.
4. Resolve dispute manually → ensure funds release correctly.
5. Wait for time-lock expiry without resolution → ensure automatic release.
6. Run cargo test to verify all unit tests pass.

Screenshots (if applicable)

N/A

Checklist

• My code follows the project's coding style.
• I have tested these changes locally.
• Documentation has been updated where necessary.

[truthixify]

Fixed the CI issue @portableDD

You can approve the workflow now.

[truthixify]

@portableDD turns out cargo fmt is not installed in the CI and that''s why its failing, you'll have to change the CI.

But the build and test passes.

[portableDD]

Lgtm

[portableDD]

@portableDD turns out cargo fmt is not installed in the CI and that''s why its failing, you'll have to change the CI.

But the build and test passes.

Thanks i will fix that