Hcli-core

- Update README. Badge move out of title.

- Remove hg from the sample applications and into it's own independent repository to foster independent development.
- Update hg related documentation.
- Remove hg related dependencies to pyserial and background scheduler.
- Remove remaining hc related documentation in README.

- Remove hc from the sample applications and into it's own independent repository to foster independent development.
- Update hc related documentation.
- Remove hc related dependencies to pyserial and background scheduler.
- Fix badging URLs and reorder.

- Fix mishandling of a disconnect exception and direct service interaction with the serial device.
- Fix nudger termination edge case.
- Fix to isolate the controler realtime loop to a single thread.
- Fix streamer termination check and reset logic to avoid realtime queue pickup during reset.

- Redesign to a controller model to improve the stability of GRBL flow control.

- Add hc logs to poll a log tail when access to server log stdout isn't available (single client polling only).
- Add hc jobs server log output and consolidate log reversal and log output into the jobs service.
- Add hc connect (without parameter) to try and auto connect to scanned serial ports, and stops at the first GRBL controller found.
- Modify log output to retain space between gcode commands for readability.
- Fix to avoid streaming empty lines from gcode files to avoid unexpected streamer code repetition.
- Fix to remove both line feeds and carriage returns correctly when processing gcode files.