Module walk 

Shared bounded directory walkers.

Replaces the per-plugin collect_*_files helpers that previously lived in nearly every module. Each function performs an iterative (no-recursion) walk with optional bounds and returns a sorted Vec<PathBuf> for deterministic test output.

Variants

• walk_files — single-extension filter, no bounds.
• walk_files_multi — multiple extensions (case-insensitive).
• walk_files_bounded_depth — single extension with a maximum directory depth (for content trees).
• walk_files_bounded_count — single extension with a maximum file-count cap (for live-reload / batch I/O fast-paths).

All variants return Ok(Vec::new()) when the root directory does not exist or is not a directory — matching the convention used by every previous local collector in the crate.

Functions

visit_files_bounded_depth

Visits every file with extension ext under dir, in a deterministic order, without materialising the file list.

walk_files

Recursively collects files matching extension under dir.

walk_files_bounded_count

Recursively collects files matching extension, capped at max_files. Provides with_context on the underlying read_dir failure.

walk_files_bounded_depth

Recursively collects files matching extension, bounded by depth.

walk_files_multi

Recursively collects files matching any of extensions under dir.