pub fn load_pro_pedal_sub(pro_sub_path: &str) -> Option<String>Expand description
Try to load a file at pro_sub_path (relative to the pedalkernel-pro repo
root, e.g. "crates/acidattack/acidattack-core/tb303_filter.pedal" or
"pedals/legends/screamer.pedal").
Tries several candidate ../ depths from CARGO_MANIFEST_DIR so that tests
work in both normal checkout and git-worktree layouts.
Returns None — never panics — when the pro repo is absent, so callers can
skip gracefully via [skip_if_missing!].