ci: Skip reviews for PRs with [citest_skip] in the title

[spetrosi]

• Add info about .coderabbit.yam for AI assistants to contributing.md
• Note that CodeRabbit uses config from the main branch so this change will apply
  after this PR is merged.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds CodeRabbit configuration establishing AI coding standards for the repository, PR validation rules (Conventional Commits format and structured descriptions), and detailed Ansible code conventions for roles, tests, templates, and variables. Contributing documentation is updated to direct contributors to the configuration, and the Ansible collection dependency is pinned.

Changes

Repository Configuration and AI Coding Standards

Layer / File(s)	Summary
CodeRabbit configuration for AI standards .coderabbit.yaml	Defines CodeRabbit feature toggles, PR title/description validation (Conventional Commits and template requirements), and comprehensive path-specific coding standards for Ansible roles, handlers, tests, templates, and variable documentation.
Documentation and dependency updates contributing.md, meta/collection-requirements.yml	Contributing guide documents that .coderabbit.yaml defines coding standards for AI assistants. Ansible collection ansible.posix is pinned to version >=2.1.0,<2.2.0.

🚥 Pre-merge checks | ✅ 4 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description Format	⚠️ Warning	PR description uses bullet-point list format instead of required template with Enhancement/Feature, Reason, and Result sections from .github/pull_request_template.md.	Reformat PR description to follow template: Feature section describing changes, Reason section explaining why, Result section describing impact.
Description check	⚠️ Warning	The PR description is incomplete, missing required template sections (Enhancement, Reason, Result, Issue Tracker Tickets).	Complete the description using the required template with Enhancement, Reason, Result, and Issue Tracker Tickets sections.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The PR title follows Conventional Commits format with type 'ci' and descriptive message about skipping reviews.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}