* refactor: change `commands` -> `run`, and only accept a single string

* feat: support step-level outputs

This will be read by the containing task to produce task outputs.

* feat: task-level outputs

* refactor: move to one global state

This must be done now that we update the state using the diffing method,
rather than just keeping a mutable reference to it.

- Replaced separate `run` and `uses` fields in the Step struct with a single `action` field of type StepAction.
- Updated workflow validation and execution logic to accommodate the new StepAction enum.
- Adjusted tests to reflect changes in step definitions and ensure compatibility with the new action structure.

…ses` and `run`

This reverts commit 95b03c3.

Steps should only have one unit of work to keep things simple

**Problem:** When running a matrix task, child tasks are executed and
run as normal, but the master task also attempts to run and will produce
variable resolution errors (since it is not really meant to be run, just
to track its children).

**Solution:** Introduce a new `is_master` field to track whether a task
is a master task, and read it to determine whether or not the task
should be run

ID is only really needed to select step-level outputs (which we no
longer have). Description isn't a big deal, but names shouldn't be
complex enough that they warrant a separate, longer description than the
one `name` provides.

feat: Generate TypeScript types with ts-rs

feat: Scheduler WASM

refactor: Separate scheduler from core

…cies

…kflow