Add support for MacOSX

[mathbagu]

Please check if the PR fulfills these requirements (please use '[x]' to check the checkboxes, or submit the PR and then click the checkboxes)

• [X] The commit message follows our guidelines
• [X] Tests for the changes have been added (for bug fixes / features)
• [X] Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem ? If so, link to this issue using '#XXX' and skip the rest N/A

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) Feature

What is the current behavior? (You can also link to an open issue here) Powsybl-math-native is not supported on MacOSX

What is the new behavior (if this is a feature change)? Powsybl-math-native is now supported on Linux, MacOSX and Windows

Does this PR introduce a breaking change or deprecate an API? If yes, check the following:

• [ ] The Breaking Change or Deprecated label has been added
• [ ] The migration guide has been updated in the github wiki (What changes might users need to make in their application due to this PR?)

Other information:

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