Add API parity tables

[goto-bus-stop]

Since the Node.js version implemented by this module differs for each API, a table might be helpful to inform users what APIs they can use (and to keep track of what is still to be done).

[BridgeAR]

Seems like a good idea until everything is up to date but even then it's good to know the feature parity.

[goto-bus-stop]

(I will confirm the inspect and format versions later, may need to compare source a bit)