Bash permission-matcher flag parsing expanded for more coreutils commands

Claude Code checks bash commands against permission rules by understanding each command's flags. The flag-classification logic was replaced with a richer system that distinguishes boolean short flags, valued short flags, attached short/long flags, boolean long flags, and valued long flags. This was applied to tac, fold, expand, unexpand, fmt, comm, cmp, pr, and numfmt, each of which now recognizes many more of their real flags — for example pr gained recognition of --across, --join-lines, and --omit-header.