docs(models): update Claude model options and add server overload error handling

- Add new Claude 3.7 Sonnet model as default option
- Update model options list with Claude 3.7 Sonnet
- Add server overload error handling (529) to error feedback table

Author: tsdevau

README.md

@@ -138,13 +138,14 @@ Add additional custom instructions to the commit generation prompt. Useful for p
 
 The Anthropic AI model to use for generating commit messages.
 
-| **Type** | **Options**                | **Default Value**         |
-| :------- | :------------------------- | :------------------------ |
-| enum     | "claude-3-5-sonnet-latest" | "claude-3-5-haiku-latest" |
-|          | "claude-3-5-haiku-latest"  |                           |
-|          | "claude-3-opus-latest"     |                           |
-|          | "claude-3-sonnet-20240229" |                           |
-|          | "claude-3-haiku-20240307"  |                           |
+| **Type** | **Options**                | **Default Value**          |
+| :------- | :------------------------- | :------------------------- |
+| enum     | "claude-3-7-sonnet-latest" | "claude-3-7-sonnet-latest" |
+|          | "claude-3-5-sonnet-latest" |                            |
+|          | "claude-3-5-haiku-latest"  |                            |
+|          | "claude-3-opus-latest"     |                            |
+|          | "claude-3-sonnet-20240229" |                            |
+|          | "claude-3-haiku-20240307"  |                            |
 
 ### `diffCommit.maxTokens`
 
@@ -185,6 +186,7 @@ Diff Commit provides clear feedback for various scenarios to help troubleshoot i
 |                          | Forbidden: Permission denied, update your API key and try again  | The API key doesn't have permission for this operation (403)  |
 |                          | Rate Limited: Too many requests, try again later                 | You've exceeded your API rate limit (429)                     |
 |                          | Server Error: Anthropic API server error                         | An error occurred on Anthropic's servers (500)                |
+|                          | Server Error: Anthropic Server Overloaded                        | The Anthropic API server is overloaded (529)                  |
 | **Other Errors**         | Failed to write commit message to Source Control                 | Unable to update the SCM input box with the generated message |
 |                          | Failed to open commit message preview                            | Unable to open the preview editor                             |
 |                          | No commit message was generated by the API                       | The API response didn't contain a valid commit message        |