Adds the aetheria.verse_grammar global and aetheria.verse_verb documents (one render path per verb, typed
participant roles), VerseGrammarValidation run by AetheriaStores.Open over every verb, the AetherDb
'verse-grammar [apply]' command (starter set: one ship-action verb per TaskType plus speak; question
verse-social-verbs default speak-only), and VerseGrammarTests with a deterministic fixture writer.
The shipped catalog does not carry the grammar yet: it lands in the next commit, so
The_shipped_catalog_holds_revision_one_and_the_seven_starter_verbs fails at this commit. Not yet built when committed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
