chore: basic attack scenarios

[just-mitch]

As a security engineer, I want to implement attack scenario tests so that I can verify the network's security properties.

- [ ] Implement test for invalid block proposals
- [ ] Create test for invalid proof submissions
- [ ] Develop test for dishonest sequencer coalitions
- [ ] Implement L1 censorship resilience test
- [ ] Integrate attack scenario tests with CI pipeline