Release v1.4.2

Release v1.4.1

Release v1.4.0

Release v1.3.2

Release v1.3.1

Release v1.3.0

Merge pull request #3 from open-ships/feat/supervised-execution

Add supervised safety-adjacent execution

Merge pull request #2 from open-ships/feat/state-observation

Add state observation and inspection

Merge pull request #1 from open-ships/feat/stateful-execution

Add stateful execution modules

Add the statemachine package, tests, docs, and CI

The library is a transition table compiled once and applied to state the
caller owns: Compile/MustCompile, Fire, Permitted, and ErrNotPermitted.
The machine holds no current state, which is what removes the need for
an internal mutex, observer registry, or deferred-transition protocol.

Requires Go 1.26, which keeps Permitted allocation-free: through 1.25 the
iter.Seq2 it returns escaped to the heap at 88 B and 3 allocations per
call, and escape analysis in 1.26 keeps it on the stack.

CI matches the pattern in teleop and n2k: a three-OS matrix on 1.26.x,
with the source-property checks on Linux only, and a release workflow
that tags from VERSION after a successful CI run on main.