Publish continuous release and run reccmp diff in CI

[disinvite]

I moved the reccmp steps into the build pipeline. The reccmp-reccmp --json <file> command creates a file to be used later by reccmp-reccmp --diff <file> to display the diff report for the pull request or push.

To do this, the JSON file of the last push to master needs to exist somewhere. We package that and the build artifacts into a continuous release. This is the same workflow we used in isledecomp/isle.

I could not test the release step on my branch. Hopefully all the paths are correct.

[xmvziron]

Forgive my ignorance, but doesn't this update all the files in the build-dll/ folder? Even the obj files that aren't needed?

[disinvite]

It should only be the artifact files uploaded from the build and build-dll steps:

# upload:
- uses: actions/upload-artifact@v4
  with:
    name: th08
    path: |
      build/th08.exe
      build/th08.pdb
# download:
- uses: actions/download-artifact@main
  with:
   name: th08
   path: build

# upload:
- uses: actions/upload-artifact@v4
  with:
    name: th08-dll
    path: |
      build/th08.dll
      build/th08.pdb
# download:
- uses: actions/download-artifact@main
  with:
   name: th08-dll
   path: build-dll

but we can change it on the final release action to make that more clear.