languages: Add ignore keyword for gomod (#41520)

go 1.25 introduce ignore directive in go.mod to specify directories the
go command should ignore.

ref: https://tip.golang.org/doc/go1.25#go-command


Release Notes:

- Added syntax highlighting support for the new [`ignore`
directive](https://tip.golang.org/doc/go1.25#go-command) in `go.mod`
files
379bdb227aBing Wang committed on 11/3/2025, 3:11:50 PM· committed by GitHubparent04e53bf
4 files changedLine totals unavailable