* feat(cbindings): first commit - waku relay (#1632)
* test_app.nim: fix compilation issue. App.init(..) -> App.new(..)
* Simplifying library name (libwaku) and standardizing function names (waku_*)
* Proper wrapper of the waku_node API and creation of the libwaku.a
* Rolling back changes that are not needed
* Rolling back changes that are out of the scope of this task
* wakunode.nim: Removing unnecessary import
* Aplying PR suggestions
* Renaming 'waku.h' -> 'libwaku.h'
* Use of 'isNil' instead of '== nil'
* libwaku.nim: explicitly setting waku_poll() as gcsafe
Ivan Folgueira Bande