Include the /dist directory in the release instead of building the action in docker every time it runs

[bobergj]

Context

Every time the actions runs there's a docker build step:

Build stoplightio/spectral-action@latest time: 1m 12s

That takes > 1 minute on the github ubuntu-latest (currently Ubuntu 22.04.1 LTS) image.
The actual validation of our openapi spec takes just under a second.

Current Behavior

The action is setup as a docker container action that builds the action every time it is executed.

Expected Behavior

• The action is setup as a javascript action, with the /dist directory checked in and part of the release, so that there is no build step on action run.

• Runtime is only spent on the actual validation.

• As in the typescript action sample implementation a check-dist.yml workflow verifies that the checked in /dist matches expected build

Assumptions

• All dependencies are pure typescript/javascript that can be precompiled and run on the github actions node.js version - there are no runtime dependencies that require executing in a docker container.
  • From a glance at the dependencies in the package.json, this seems to be true.

[jamietanna]

Relates to #452 - I may have a look at seeing if I can get a PR raised for this 🤞