chameleon 2.56.1

Added

• README "Usage examples" section. The landing page showed the hooks
  working but never showed what you actually type. A new section between
  Install and Commands covers the five moments you reach for a command:
  teaching a wrapper-preference rule (the one-sentence free-form and the
  structured slug:/rationale: forms), plain-English comprehension
  questions and the tools they route to (search_codebase, get_callers,
  get_blast_radius), the three /chameleon-pr-review input formats, the
  /chameleon-explain <file> incident replay, and the inline
  chameleon-ignore override with its demotion feedback loop. Every command
  form, field name, and rule id in the section was verified against the skill
  definitions and tool docstrings before shipping.

Fixed

• Stale proof numbers in the README. The "Proof, not promises" table and
  the tests badge lagged reality: 5,205 unit tests and 172 releases to
  v2.54.0 where the checkable numbers are 5,206 tests and (with this release)
  175 tags to v2.56.1. The table exists to be re-run; now it passes its own
  verify commands again.