Clean up rebranding drift in docs, agent configs, and source comments
Fix stale references left over from the alknet-typedef → alktype migration:
- .opencode/agents/: replace @alkdev/alknet constraints (tokio, crypto, feature
flags, anyhow/thiserror) with alktype-accurate ones (sync, AlkTypeError,
WASM-clean); fix @alkimiadev → @alkdev org name; remove nonexistent AGENTS.md
ref; replace alknet-http/alknet-agent spec examples
- docs/sdd_process.md: fix wrong package name (@alkdev/storage → @alkdev/alktype)
- docs/architecture/: rewrite dangling /workspace/ and docs/research/ paths as
@alkdev/alknet: cross-repo references with explanatory notes; fix
@alkimiadev → @alkdev; fix 'not yet used by any alknet crate' stale context
- src/ + tests/: correct '17 AlkType kinds' → '19' in doc comments (enum has 19
variants; pre-existing count error); fix dangling /workspace/ path in
poc_roundtrip.rs