lsp: Broadcast our capability for `MessageActionItem`s (#45047)
Closes #37902
Release Notes:
- Enable LSP Message action items for more language servers. These are interactive prompts, often for things like downloading build inputs for a project.
d2bbfbb3bfJulia Ryan committed on 12/18/2025, 7:09:40 PM· committed by GitHubparent413f4ea