ci: upload precompiled binaries to releases

[JamieMagee]

This PR simplifies and separates the build and release GitHub actions workflows.

• The build workflow builds and runs tests on push to any branch, and pull requests
• The release workflow builds and publishes self-contained binaries and NuGet packages when a release is published i.e. moved from draft to published

You can see what this looks like in my fork of this repository¹. However, I was unable to get the NuGet publishing to work correctly. I believe this is due to the permissions set on GITHUB_TOKEN for forked repositories²

Other changes:

• Replaced the deprecated actions/upload-release-asset action with the shogo82148/actions-upload-release-asset action (This appears to be the community replacement"
• No longer publish platform-independent runtime-dependent releases in favour of platform-dependent runtime-independent
• Simplify NuGet package publishing now that GitHub packages registry supports NuGet's --api-key flag³

Closes #21

Footnotes

1. https://github.com/JamieMagee/component-detection/releases/tag/v1.0.14 ↩

2. https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token ↩

3. https://github.com/NuGet/Home/issues/8580#issuecomment-714501802 ↩