chore: delete existing firewall tests and migrate smoke tests (#229)

* Initial plan

* chore: delete firewall tests and migrate smoke tests

- Delete basic-firewall.test.ts, robustness.test.ts, claude-code.test.ts
- Delete test-integration.yml, test-claude.yml, firewall-escape-test.md/.lock.yml
- Delete old smoke-claude.lock.yml, smoke-copilot.lock.yml
- Add smoke-claude.md with local-build sandbox config
- Add smoke-codex.md with local-build sandbox config
- Add smoke-copilot.md with local-build sandbox config
- Update tests/README.md and TEST_RESULTS.md documentation
- Update references in AGENTS.md, CLAUDE.md, quickstart.md
- Update download-latest-artifact.sh defaults

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

* fix: standardize URL format in smoke-copilot.md

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

* chore: compile smoke tests with gh aw compile

- Update smoke-claude.md, smoke-codex.md, smoke-copilot.md with correct sandbox config
- Generate smoke-claude.lock.yml, smoke-codex.lock.yml, smoke-copilot.lock.yml

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

* chore: trigger smoke tests on every PR and remove create-issue

- Change pull_request trigger from labeled to [opened, synchronize, reopened]
- Remove create-issue from safe-outputs in all smoke tests
- Recompile smoke tests with gh aw compile

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

Author: Copilot