nethadone-2024-08-12: ms8.2 - usability and documentation improvements

* Revamp documentation to reflect somewhat easier installation process
  using new single-binary builds
* Add strategy target for rockchip64 devices so we're not dependent on
  older kernel builds from the armbian-btf-kernel repo
* Clean up unneeded dependences from image build and set up most items
  to run on reboot automatically
* Small issue fixes here and there