Commit fixes to build mimick_vendor on Windows locally

[traversaro]

Debug #28 .

[Tobias-Fischer]

I found that some builds fail in the PRs but build okay on the main branch - feel free to commit there, too.

[traversaro]

I was not unable to fix #28 . Anyhow, I commit the fixes that were necessary to build the package in #21 (comment) , that are mainly:

• Patch to use FetchContent instead of ExternalProject on Windows: the build is already quite error-prone on Windows, at least we can avoid all the logic of manually forwarding options and parameters by using FetchContent and building mimick directly as part of the mimick_vendor project
• Use the commit corresponding to Fix detection of 64-bit for Visual Studio 2019 and 2022 ros2/Mimick#25

[Tobias-Fischer]

Thanks @traversaro - I will see whether this actually builds on the Windows CI first; if not, I will upload your pre-built package.

[Tobias-Fischer]

It built fine in CI - thanks so much @traversaro!

[wolfv]

Wow, awesome!