ci: Setup SonarCloud Analysis

[Leonardo-Ferreira]

This pull request enables the analysis of the project by sonarcloud.

The reports will be accessible at https://sonarcloud.io/organizations/casbin/projects

A preview of the result can be seen here: https://sonarcloud.io/organizations/leonardo-ferreira/projects

[casbin-bot]

@sagilio @xcaptain @huazhikui please review

[Leonardo-Ferreira]

@hsluoyz the build is failing with a empty sonar key Idk exactly why though... either you entered the key in the wrong place, or actions triggered by me aren't allowed to read it... Can you help?

[Leonardo-Ferreira]

@sagilio because the pipeline already runs tests, and all im doing is basically "wrapping" it with sonar begin/end I thought it wouldn't be a matter, specially because in the future we can use sonar quality gates to prevent things that hurt the project (bug introduction, test coverage drop, tech debt) to be introduced, and block the PR! Would you still want to separate the workflows?

[Leonardo-Ferreira]

@hsluoyz please create 2 secrets: SONAR_PROJECT_KEY = casbin_Casbin.NET SONAR_CASBIN_ORG_NAME = casbin

[hsluoyz]

@Leonardo-Ferreira we can try separated workflows first. Done:

[Leonardo-Ferreira]

@huazhikui I broke up the workflows but I think we are back to the previously mentioned issue: either values are empty or my workflow can't/not-allowed-to read them...

[hsluoyz]

@Leonardo-Ferreira plz merge the commits into 1 or 2, 23 commits are too many for such a PR..

[sagilio]

PR can not read the secret when using GitHub Actions, we can merge it first.

[hsluoyz]

Replaced by: https://github.com/casbin/Casbin.NET/pull/223