Add activation scripts to workaround problem in relocatability

[traversaro]

Fix #25 .

The activation scripts are far from perfect, I have opened #26 to track that.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[traversaro]

@conda-forge-admin, please rerender

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.
I tried to rerender for you, but it looks like there was nothing to do.

[traversaro]

Testing a local version of this package on ign-sensors's examples/save_image, the image is correctly generated on Windows:

[Tobias-Fischer]

Thanks for this @traversaro! Should we use $PKG_NAME instead of hard coding the name though so it's less work when updating versions?

[traversaro]

Thanks for this @traversaro! Should we use $PKG_NAME instead of hard coding the name though so it's less work when updating versions?

Sure! That was what I wanted to track in #26 , for the first version I wanted to minize the possibility of doing something wrong. : )