assistant: Include diagnostics in slash commands by default (#13359)

Include error diagnostics by default for the following slash commands:
`/file`, `/tabs`, `/active`

Release Notes:

- N/A
abb46473c9Bennet Bo Fenner committed on 6/21/2024, 12:28:12 PM· committed by GitHubparent9bdb154
4 files changedLine totals unavailable