Add weighing sensor HX710/HX711/HX712

[GuoGeTiertime]

I implemented support for weighing sensor HX710/HX711/HX712
and tested on HX711.

The HX71X class is very simple and the function is periodically
to read the measurement data from HX711. This is a base class,
and other modules can query the measurements to complete bed mesh
, XYZ home probe or record filament usage.

the Configuration exmaple:
[hx71x HX711]
hx71x_mcu: mcu
hx71x_sck_pin: PD6
hx71x_dout_pin: PD7
hx71x_report_time: 0.5
hx71x_scale: -0.002

Signed-off-by: GuoGe [email protected]

[Sineos]

Thank you for submitting a PR, please could you refer to point 3 in the "what to expect" section in master/docs/CONTRIBUTING.md and add a signed-off-by line.

Also, you might want to cross-check and align with:

• Support for load cell homing/probing + hx711 adc #6018
• https://klipper.discourse.group/t/testing-request-load-cell-homing-probing-hx711-adc-6018/6412
• https://klipper.discourse.group/t/load-cell-probing-algorithm-testing/9751

[github-actions]

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[github-actions]

Unfortunately a reviewer has not assigned themselves to this GitHub Pull Request and it is therefore being closed. It is a good idea to move further discussion to the Klipper Discourse server. Reviewers can reach out on that forum to let you know if they are interested and when they are available.

Best regards,
~ Your friendly GitIssueBot

PS: I'm just an automated script, not a human being.