Improve Maintainer QoL

[4kbyte]

Re: #90, helpful improvements to the project itself:

• A build workflow to lint/test on localhost, currently only defined in the GitHub Action.
• A straightforward means to test project edits on a machine that has a production version installed.
  • In the style of setup.py develop or pip "editable" package.
  • Isolation, no risk of unintentionally importing previously installed version.
  • Ability to interface with openrazer daemon as usual.
• Clarification of the openrazer dependency, i.e. what razer-cli does and what it expects from the daemon, and an editorial on what belongs in the CLI versus what should be left to a more comprehensive GUI.

[4kbyte]

The README does not mention dbus, but should. Noting this as part of clarifying the openrazer dependency, mentioned in the description. More generally, OS support is not obvious.