v0.0.1 — the contract crates

v0.0.1 — the contract crates

Five crates to crates.io under Apache-2.0: gwk-domain, gwk-cert, gwk-theme,
gridwork, and gwk.

cargo install gridwork did NOT work at this version, and the README said so
at the time: the gw binary and the gwk-kernel behind it were in the tree and
not on the registry. What shipped here is the contract — domain types, event
schemas, four state machines with their edge tables, the pure transition
function, the storage port and its conformance suite, and gwk-cert, which
replays an exported event stream against the contract.

Tagged retroactively. This tag names the commit the registry was published
from, which is why it carries no release engineering of its own.