chore(repo): add robust repo-state verifier script

[attaullahfayyaz4u-ux]

PR_TYPE: LOW_RISK_PR

Summary

Adds a root PowerShell repo-state verifier script that generates structured TXT/JSON verification reports outside the repository before future governance insertion or repo-state claims.

Scope Included

• Adds verify-gbse-repo-state.ps1
• Captures local repo status, branch, remotes, untracked items, key files, package scripts, and test result
• Preserves repo/runtime/fixture/benchmark/ATTA boundary discipline

Scope Excluded

• No governance standards insertion
• No runtime implementation
• No fixture or benchmark update
• No ATTA record creation
• No README/public claim change
• No dependency change

Validation

• npm test -- --runInBand: PASS, 44/44 tests
• Post-commit verifier run: PASS
• Post-commit branch verification: PASS
• GitHub compare page: able to merge, 1 commit, 1 file changed

ATTA Status

• ACKNOWLEDGED: YES
• TRACKED: YES
• TIMESTAMPED: YES
• AFFIRMED: NO — pending PR review, merge, and post-merge verification

Documentation Impact

• README.md: NO_CHANGE
• ROADMAP.md: NO_CHANGE
• CHANGELOG.md: OPTIONAL_UPDATE
• CONTRIBUTING.md: OPTIONAL_UPDATE
• docs / fixtures / benchmark docs / API docs: NO_CHANGE

Change Impact

• scripts: ADDED_ROOT_VERIFIER_SCRIPT
• source code / schemas / fixtures / tests / benchmarks / CI / dependencies / public claims: NO_CHANGE

Benchmark Impact

NO_CHANGE

Known Risk

• Windows LF/CRLF warning observed during commit.
• Non-blocking for this PR.
• Track .gitattributes only if line-ending normalization becomes recurring.

Rollback

Revert commit 1074132 or remove verify-gbse-repo-state.ps1.

Post-Merge Closure

After merge:

1. Checkout main
2. Pull latest origin/main
3. Run .\verify-gbse-repo-state.ps1
4. Run npm test -- --runInBand
5. Verify clean working tree
6. Mark this PR AFFIRMED only if closure evidence is complete

GBSE Verdict

BUILD_CLEAR for PR review/merge consideration.

BLOCKED for governance standards insertion until this verifier PR is merged or explicitly accepted as repo baseline.