docs: Create your own pull request review bot guide (#8362)

* docs: add pull request review bot guide with GitHub Actions

Add comprehensive guide for setting up an AI-powered code review bot using Continue CLI and GitHub Actions. This privacy-first approach keeps code analysis in your infrastructure while providing automated, context-aware reviews.

Features:
- 10-minute quick setup instructions
- Complete GitHub Actions workflow example
- Custom rules for Security, TypeScript, Testing, Python
- Interactive @review-bot commands
- Advanced configuration options (file filters, size limits)
- Troubleshooting section
- Example output and next steps

Inspired by CodeBunny's privacy-first approach to code reviews.

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <noreply@continue.dev>

* docs: clarify privacy model and fix APP_ID configuration

- Update privacy messaging to accurately reflect data flow: CLI runs in GitHub Actions runner and sends code directly to configured LLM provider
- Clarify that no hosted Continue service reads user code
- Fix APP_ID configuration: should be stored as repository variable, not secret
- Update Step 1 to distinguish between secrets (CONTINUE_API_KEY, APP_PRIVATE_KEY) and variables (APP_ID)

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <noreply@continue.dev>

* Utlize cards

* Utilize mintlify components for readability

---------

Co-authored-by: Continue <noreply@continue.dev>
Co-authored-by: BekahHW <rhawrot@gmail.com>

Author: 3 people

docs/docs.json

@@ -252,7 +252,8 @@
               "guides/running-continue-without-internet",
               "guides/custom-code-rag",
               "guides/how-to-self-host-a-model",
-              "guides/notion-continue-guide"
+              "guides/notion-continue-guide",
+              "guides/github-pr-review-bot"
             ]
           },
           {