Add code guidelines description

Author: ganeshpatro321

docs/integrations/knowledge-base.md

@@ -22,3 +22,21 @@ Or you can comment directly on some lines of code in the PR. `@coderabbitai do n
 Watch our [video walkthrough on learnings](https://www.youtube.com/watch?v=Yu0cmmOYA-U) for more information.
 
 :::
+
+## Code Guidelines {#code_guidelines}
+
+CodeRabbit will analyse and learn from your organisation's code guidelines, which you can setup in the knowledge base section. These guidelines will then be used to conduct thorough code reviews.
+
+These set of patterns are scanned by default.
+
+```
+**/.cursorrules
+.github/copilot-instructions.md
+**/CLAUDE.md
+**/.cursor/rules/*
+**/.windsurfrules
+**/.clinerules/*
+**/.rules/*
+```
+
+![Code guidelines image](/img/knowledge-base/code-guidelines.png)