Keep directory for file picker

[ndbn]

In situation, when need to keep working directory as project root, for correct working of LSP, but "work" in helix only in src directory there are no way to keep initial directory, command
hx src -w . in first file picker shown only content of src folder, but then, after press Space-f (and Shift-F) it shown content of project root.
The idea is to add new flag like --keep-dir for keep src for file picker, but working dir must be project root for LSP, or even make this behavour as default - specified folder as working directory for helix and --working-dir for LSP.

Another way is to create .ignore file, but I find new flag will be handy, even more than writing every time :o src.