.helix/ignore should also mask out files from diagnostic pickers

[gamma-delta]

Hello,

I'm using the ignore file feature for Godot/C# development and it's really handy!

But, when I go space D to search the workspace for errors, it also displays errors in autogenerated C# files in .godot/..., even though I have .godot/** in my ignore file.

I think it would make sense if this picker also obeyed the ignore file.

[gamma-delta]

OK, I've done a little bit of digging

The diagnostic picker is defined here. It should be possible to use the mechanism for ignoring files out of the normal file picker to filter the diagnostics...

[gamma-delta]

Looks like it's going to be hard to get perfect feature parity because the WalkBuilder does a lot of work behind the scenes to find every single ignore file (searching ~/.ignore, stuff like that).

I'll just use <helix-config>/.ignore and ./.helix/ignore for now...

[rcorre]

Typically ignoring files for diagnostics is done at the language server level. Does the C# language server have a way to ignore files?