docs: restructure ROADMAP for atomic releases, merge neurosymbolic design decisions
ROADMAP.org: restructure v0.8.1-v1.0.0 with atomic minor releases.
Eval harness at v0.9.0. 62 releases from v0.9.0 to v1.0.0.
Neurosymbolic phases (0-7) interleaved with agent features.
Lisp Machine UI deferred to v2.0.0. Cannibalization in v3.0.0+.
DESIGN_DECISIONS.org: merge neurosymbolic design rationale from
notes/ into 9-part unified document. Add McCarthy lineage,
hallucination problem, five architecture options, cardinality
policies, organic ontology, ontology versioning, sufficiency
criterion, Merkle DAG, layered auth, self-preservation, MOMo
validation, competitive argument.