ci: Add flagsmith-lint-tests pre-commit hook

[khvn26]

• I have read the Contributing Guide.
• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Changes

• Add flagsmith-lint-tests pre-commit hook from flagsmith-common (fv3.4.0)
• Add # noqa comments to all existing violations (2052 FT003, 341 FT004)

How did you test this code?

pre-commit run flagsmith-lint-tests --all-files passes.

[vercel]

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored	Preview	Mar 12, 2026 6:10pm
flagsmith-frontend-preview	Ignored	Preview	Mar 12, 2026 6:10pm
flagsmith-frontend-staging	Ignored	Preview	Mar 12, 2026 6:10pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.31%. Comparing base (dbd66e9) to head (d3c94e4).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6933   +/-   ##
=======================================
  Coverage   98.31%   98.31%           
=======================================
  Files        1335     1335           
  Lines       49717    49717           
=======================================
  Hits        48879    48879           
  Misses        838      838           

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[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-6933	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-6933	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api-test:pr-6933	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-6933	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6933	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6933	Finished ✅	Results ✅

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 10 passed

Details

 10 tests across 7 suites
 49.4 seconds
 d3c94e4
 🔄 Run: #15271 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 10 passed

Details

 10 tests across 7 suites
 25.5 seconds
 d3c94e4
 🔄 Run: #15271 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 1 passed

Details

 1 test across 1 suite
 54 seconds
 d3c94e4
 🔄 Run: #15271 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 2 passed

Details

 2 tests across 2 suites
 1 minute, 3 seconds
 d3c94e4
 🔄 Run: #15271 (attempt 1)