Allow installing the Coyote software library (and simulation)

[lucat1]

Description

This PR changes the CMake setup for the software side of coyote, in particular:

1. Both the normal software library and the simulation software library can be installed system-wide.
2. To account for this, the simulation now reads the build folder path from environment variable, instead of having it hardcoded in the compiled library objects.
3. Examples have been changed to use add_subdirectory instead of FindCoyoteSW.
4. FindCoyoteSW has been deprecated in favor of the standard find_package or add_subdirectory. A deprecation warning has been put in place, so legacy code using FindCoyoteSW won't break.
5. #includes of coyote have been changed from #include "cThread.hpp>" to include <coyote/cThread.hpp> in the software library headers to avoid any conflicts breakage when headers are installed system wide.

Type of change

• Bug fix
• New feature
• Documentation update
• A new research paper code implementation
• Other

Tests & Results

The software and simulation libraries have been compiled and installed. Files are placed in the install folder as expected. All examples have also been compiled successfully.

Checklist

• I have commented my code and made corresponding changes to the documentation.
• I have added tests/results that prove my fix is effective or that my feature works.
• My changes generate no new warnings or errors & all tests successfully pass.

[bo3z]

Mostly looks good. Most of these are minor questions for my understating.

One thing I am unclear on is: how do I compile for simulation? In the past, we used to pass the flag EN_SIM. How does it now work, in both cases (both as a system-wide installation as well as a sub-directory)

[bo3z]

LGTM