Extract shared test helpers for the Memo post and Set Name behavior
slices: fake wallet/profiles, MemoAction tests, page-controller tests,
page build wiring, and shared property-test invariants. Behavior is
preserved; all unit, property, and acceptance tests pass.
By refactorer.
Implements the post-memo behavior slice per specs/post-memo.feature:
- src/services/memo-post.js: compose, validate (empty/length), and broadcast
a Memo post OP_RETURN (0x6d02) via the minimal-slp-wallet adapter surface.
- Stands up the Babashka APS acceptance pipeline (entrypoint generator,
runtime, regex step handlers, convenience runner).
- Adds focused unit tests for the memo behavior.
By coder.
Chris Troutner