Scons builder for cython extensions (#2485)

* complie boardd without python

* not good, but don't want to lose the file, because it works

* clean a bit

* update dbc

* should build on CI

* not good, but don't want to lose the file, because it works

* clean a bit

* should build on CI

* remove unneeded path

* reorder paths

* reduce diff

* and now it works?!

* ... should work in CI

* add kj, 30% chance to fix macos

* pydebug

* new way to find path

* fix :)

* tested

* sanity check

* repl. MacOS flags

* hope it works

* need more logs

* need more logs2

* test if it works

* should work on CI

* correct python file

* should not work

* cleanup

* real cleanup

* more removals

* 50% of file

* transformations

* fixed a hardcoded variable

* more logs

* simpl.

* kalman

* all donw if it passes tests

* cleanup

* reduce code by 20 lines if this works

* fix bugs

* cleanup

* SharedLibrary

* cleanup

* ...

* remove unused

* CI fix maybe?

* add more valid path

* more logs

* ...:

* fix webcam CI

* remove WError flag

* deprecated is not an error

* more Wno things

* reduce diff, add Wno to env

* don't import nonexistent stuff

* SharedLibrary v2

* less custom env

* renaming, remove SharedLibs

* pack libs in envCython

* experiment

* better docker caching

* whitespace

* more docker caching

* improvement

* improvements

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

common/transformations/SConscript

@@ -1,8 +1,3 @@
-Import('env', 'cython_dependencies')
+Import('envCython')
 
-d = Dir('.')
-
-env.Command(['transformations.so'],
-            cython_dependencies + ['transformations.pxd', 'transformations.pyx',
-             'coordinates.cc', 'orientation.cc', 'coordinates.hpp', 'orientation.hpp'],
-            'cd ' + d.path + ' && python3 setup.py build_ext --inplace')
+envCython.Program('transformations.so', 'transformations.pyx')