lsp: Support on-type formatting request with newlines (#44882)

We called out to `request_on_type_formatting` only in handle_input
function, but newlines are actually handled by editor::Newline action.

Closes #12383

Release Notes:

- Added support for on-type formatting with newlines.
7889aaf3fbPiotr Osiewicz committed on 12/15/2025, 1:44:01 PM· committed by GitHubparent3bf57dc
1 file changedLine totals unavailable