build: skip full CI for documentation only changes

[kostis-codefresh]

Does not run the full CI (build/test/e2e) for documentation only changes.

Closes #4736

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• My builds are green. Try syncing with master if they are not.
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• I have run all tests locally (including the flaky ones) and they pass on my workstation
• I have used LLM/AI/Agent tools for this PR but I am responsible for all code of this PR
• I understand what the code does and WHY/HOW it works in several scenarios
• I know if my code is just adding new functionality or changing old functionality for existing users
• My organization is added to USERS.md.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Published E2E Test Results

  4 files    4 suites   3h 43m 53s ⏱️
120 tests 106 ✅  7 💤 7 ❌
488 runs  452 ✅ 28 💤 8 ❌

For more details on these failures, see this check.

Results for commit dd62dd2.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.01%. Comparing base (200f934) to head (dd62dd2).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4737      +/-   ##
==========================================
- Coverage   85.03%   85.01%   -0.03%     
==========================================
  Files         164      164              
  Lines       18989    18989              
==========================================
- Hits        16147    16143       -4     
- Misses       1993     1995       +2     
- Partials      849      851       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

Published Unit Test Results

2 469 tests   2 469 ✅  3m 19s ⏱️
  129 suites      0 💤
    1 files        0 ❌

Results for commit dd62dd2.