Add CodeRabbit AI code review config

[erikdarlingdata]

Summary

• Adds .coderabbit.yaml to enable automatic AI code reviews on PRs
• Configures auto-review for PRs targeting dev and main branches
• Adds path-specific instructions for Avalonia app, PlanAnalyzer core, MCP server, and tests
• Uses "chill" profile to keep reviews useful without excessive noise
• Enables gitleaks for secret detection

Test plan

• Merge this PR, then open a test PR against dev to confirm CodeRabbit reviews it
• Verify path instructions provide relevant context in review comments

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Added internal code review configuration settings.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 0f3decb2-d25a-4d46-b137-5f6b0afc01df

📥 Commits

Reviewing files that changed from the base of the PR and between ce1dd3c and 7a60489.

📒 Files selected for processing (1)

• .coderabbit.yaml

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📝 Walkthrough

Walkthrough

A .coderabbit.yaml configuration file is introduced, establishing CodeRabbit settings for automated code reviews with global preferences, path-specific review instructions for different modules, auto-review triggers on designated branches, and enabling gitleaks scanning and GitHub checks integration.

Changes

Cohort / File(s)	Summary
CodeRabbit Configuration .coderabbit.yaml	New configuration file with global settings (language: en-US, free tier enabled), review profiles with path filters, module-specific review instructions for Avalonia app, core library, MCP server, and tests, auto-review on dev/main branches, and tool integrations for security scanning and GitHub checks.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding a CodeRabbit configuration file for automated AI code reviews.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/coderabbit-config

📝 Coding Plan

• Generate coding plan for human review comments

---

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

Tip

CodeRabbit can enforce grammar and style rules using `languagetool`.

Configure the reviews.tools.languagetool setting to enable/disable rules and categories. Refer to the LanguageTool Community to learn more.