vim: Add `:sp[lit] <filename>` and `:vs[plit] <filename>` support (#33686)

Closes #32627

Release Notes:

- Adds `:sp[lit] <filename>` and `:vs[plit] <filename>` support
acff48fc0dAidanV committed on 7/9/2025, 5:43:43 AM· committed by GitHubparentecf4d55
1 file changedLine totals unavailable