chore: align PR #713 with develop - remove extra files and revert workflows

Phase 1 alignment completed:
- Removed 53 files that don't exist on develop:
  - Build artifacts (.solhint.json, functions.txt)
  - Misnamed contracts (totalBalancesStorageWrapper.sol, BondUSARead.sol)
  - TimeTravel test contracts (6 files)
  - Demo test files (3 files)
  - Unit test files (40 files)
- Restored TotalBalancesStorageWrapper.sol from develop
- Reverted .github/ workflow files to match main

This ensures PR #713 only contains codebase changes,
while workflow changes remain in PR #712.

Signed-off-by: Miguel_LZPF <miguel.carpena@io.builders>

Author: MiguelLZPF