Play Framework

chore: drop orphan documentation/commands/*.txt (PF-91)

These 20 help-text files were read by the old Python CLI's `play
help <command>` dispatcher. The Gradle-era `play` shim hardcodes
its help text inline (lines 79-216) and never reads them. Several
files still document Python-CLI flags the Gradle shim doesn't
accept (e.g. cmd-autotest.txt: --deps --unit --functional
--timeout=xxx; cmd-run.txt: -f --deps).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>