fix: declare missing 'globals' devDependency (eslint 10 lint)

[Coding-Dev-Tools]

What

Adds globals to devDependencies (^17.7.0).

Why

eslint.config.mjs imports globals, but it was never declared — it came in transitively via eslint 9. After the eslint 10 upgrade (#47), that transitive path is gone, so npm install && eslint . failed with ERR_MODULE_NOT_FOUND: Cannot find package 'globals'. This restores green lint.

How to verify

npm install && npm run lint → exit 0 (verified locally under eslint 10.6.0).

[github-actions]

🤖 Automated Code Review

✅ Ruff Lint — No issues

⚠️ Ruff Format — Formatting needed

Would reformat: src/api_contract_guardian/cli.py
Would reformat: src/api_contract_guardian/diff.py
Would reformat: src/api_contract_guardian/gate.py
Would reformat: src/api_contract_guardian/loader.py
Would reformat: src/api_contract_guardian/migration.py
Would reformat: tests/test_diff.py
Would reformat: tests/test_edge_cases.py
Would reformat: tests/test_gate.py
Would reformat: tests/test_migration.py
9 files would be reformatted, 6 files already formatted

✅ Secret Detection — Clean

✅ Large Files — Within limits

📊 Diff Stats — 2 file(s) changed

 package-lock.json | 16 +++++++++++++++-
 package.json      |  3 ++-
 2 files changed, 17 insertions(+), 2 deletions(-)

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Verdict: ⚠️ Warnings — Lint/format issues found. Recommend fixing before merge.

Automated by Coding-Dev-Tools/.github reusable workflow.