Feat/test

[nafsonig]

Update Completed

• Created multisig_tests.rs
• Updated tests.rs to include the new suite

What’s covered

• initialize() verified with correct threshold and duplicate init failure
• submit_transaction() success path and non-owner submission failure
• confirm_transaction() approval accumulation and duplicate owner approval rejection
• execute_transaction() fails below threshold, succeeds at threshold, and rejects re-execution
• revoke_confirmation() lowers the approval count and blocks execution after revocation
• propose_add_owner() / propose_remove_owner() checks non-owner rejection and owner removal constraints
• 2-of-3 and 3-of-5 threshold flows both tested

Verification

• Editor diagnostics report no errors in:
  • multisig_tests.rs
  • tests.rs

Run cargo test -p multisig-wallet in contracts to validate the suite fully.

Updated todo list

Made changes.

Closes #816
Closes #822

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[yusuftomilola]

My boss. Kindly help resolve conflicts