Add github actions

[SarahAlidoost]

relates #40

The failed workflow will be fixed when documentation is added.

[rogerkuou]

Hi @SarahAlidoost, FYI, I initiated the documentation at: https://motionbylearning.github.io/stmtools/. I will add more contents, but the URL should remain the same.

[rogerkuou]

Thanks @SarahAlidoost! I will merge this one after #49

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[rogerkuou]

Hi @SarahAlidoost, I made to updates:

1. finished the docs and merged to main (Documentation #49). Then merged main to this branch. Now all actions seem to work.
2. add a pypi action

For me it's all good to go. Would you like to give a final look?

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[SarahAlidoost]

Hi @SarahAlidoost, I made to updates:

1. finished the docs and merged to main (Documentation #49). Then merged main to this branch. Now all actions seem to work.
2. add a pypi action

For me it's all good to go. Would you like to give a final look?

Thanks, looks good to me.