Document generate sequence diagram command

Author: 0xCLARITY

docs/guides/code-review-best-practices.md

@@ -22,6 +22,7 @@ For a CodeRabbit command reference, see [Code review command reference](/referen
 - Use `@coderabbitai pause` before making multiple commits.
 - Resume reviews with `@coderabbitai resume` when ready.
 - Consider `@coderabbitai full review` after substantial changes.
+- Consider generating a fresh sequence diagram with `@coderabbitai generate sequence diagram` after significant updates.
 
 ## Documentation flow
 

docs/reference/review-commands.md

@@ -32,6 +32,7 @@ CodeRabbit through chat, see [Interact with CodeRabbit reviews](/guides/code-rev
 | Command                             | Description                                  | Use Case                                            |
 | ----------------------------------- | -------------------------------------------- | --------------------------------------------------- |
 | `@coderabbitai generate docstrings` | Generates docstrings for functions in the PR | When you need automatic documentation for your code |
+| `@coderabbitai generate sequence diagram` | Generates a sequence diagram of the changes in this PR | When you need a UML sequence diagram to visually explain the changed code |
 | `@coderabbitai generate unit tests` | Generates unit tests for the PR              | When you need automatic unit testing for your code  |
 | `@coderabbitai configuration`       | Shows current CodeRabbit settings            | When you need to check or export your configuration |