print-files: --exclude argument

[dvolodin7]

Extend the scripts/print-files.py utility so operators can exclude specific files or directories from the printed set, and so the tool dumps text sources

Key changes

• Add a --exclude option (repeatable, action="append"). Each value is a relative file or directory path to drop from the output; a directory exclude pr
• Add the SAFE_SUFFIXES allowlist: .py .sql .ts .json .yaml .js .conf .yml .css .sh .toml .md .html .xml .txt .j2. Files are filtered on this list both
• Rework main onto argparse (variadic positional paths, --exclude). The default scan base is "." (relative) so that relative --exclude values m
• Blank --exclude values are ignored (if p), so a stray empty argument no longer wipes the whole output.
• Bump the copyright year to 2007–2026.

Notable implementation details

• is_excluded(path) returns true when the path equals an exclude entry or has one as an ancestor, so a directory exclude prunes its subtree at every visi
• is_safe(path) requires path.is_file() and a recognised suffix.
• The relative default base (".") is what makes the --exclude matching reliable; an absolute base (the previous behaviour) caused relative excludes to