support post run scripts

[Vrtgs]

this is useful for example for with use with a packer, such as UPX

[taiki-e]

To be honest, I personally am not very happy with allowing execution of arbitrary code.

If there is really no other way to support it then I guess we have no choice...

[Vrtgs]

To be honest, I personally am not very happy with allowing execution of arbitrary code.

I mean build scripts are already a thing soooo

[ahaoboy]

#85

If support uploading artifacts, there is a solution

- uses: taiki-e/upload-rust-binary-action@v1
  with:
    dry-run: true
    artifact: true

- uses: actions/download-artifact@v4
- some post scripts
- uses: softprops/action-gh-release@v2