Create unified libcanard interface (in C++?)

[mayshukla]

We need to have a single libcanard wrapper that is stored outside of each project so that we aren't copying code around, and to have a nice, easy-to-understand interface.

[mayshukla]

From jira:
David Lenfesty
20 August 2020, 20:04

Simply needs more testing on boards before we call it done.

[JackOpgenorth]

Closing since we are no longer migrating to v1