Automate generation of Docker Image

[fjtrujy]

Descriptions

This PR integrates CI/CD in the repo. The main purpose of this CI/CD are:

• Now in advance, if a PR pending to be merged to Master is compiling.
• Generate a docker image ps2dev/ps2sdk-ports:latest, for being used latest by https://github.com/ps2dev/gskit as based image.

In total there is a group of 4 PRs to implement the flow. If we want to have the CI/CD green since the beginning we need to merge them in order and after the previous one finish the workflows.

The proper order is:

1. https://github.com/ps2dev/ps2toolchain/pull/67
2. https://github.com/ps2dev/ps2sdk/pull/118
3. https://github.com/ps2dev/gsKit/pull/36
4. https://github.com/ps2dev/ps2sdk-ports/pull/50

Everything has been done, thanks to:

• @ooPo for giving me the grants in the ps2dev group in GitHub.
• @AKuHAK for giving me the grants to the ps2dev group in Docker Hub
• @rickgaiser for being involved in the whole process since the first minute.