Update docs and examples

[zariiii9003]

I tried to make to the docs slightly less confusing for beginners.

• add all public methods to the documentation of can.Bus. The documentation of can.BusABC is moved from Bus to Internal API
• add a proper documentation of the interface argument and update the examples to use interface instead of bustype. Link to the list of all interfaces in configuration.rst
• add missing interfaces to configuration.rst
• improve documentation of the plugin interface. Add a recommendation to use the plugin interface to development.rst

[codecov]

Codecov Report

Merging #1421 (793463c) into develop (4b43f33) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1421      +/-   ##
===========================================
- Coverage    65.28%   65.28%   -0.01%     
===========================================
  Files           81       81              
  Lines         8777     8779       +2     
===========================================
+ Hits          5730     5731       +1     
- Misses        3047     3048       +1     

[hardbyte]

Great job

[hardbyte]

💯