Fix reading zero reference position

This release fixes the error not reading the zero_reference_position from the bed mesh with recent Klipper version.

Revised Messages

• (Error) messages are now revised and it should be easier to find the source.

Full control

• Bugfix for not reading the safe_z_home position
• Add new gcode parameter for the switch position
• Add new gcode parameter for the switch offset

Now you can use gcode parameters for the calibrate_z command to set the nozzle, switch and bed position, and even the switch offset.

Compatibility with the latest probe changes

• compatibility with Klipper d4bae4d
• new gcode parameter for the nozzle position
• use probe session to indicate multiple probes

Support for the Zero Reference Position

This release adds compatibility for the new zero_reference_position of the mesh configuration which replaces the relative_reference_index.

Fixing max_deviation/offset_margins

There are two bug fixes:

• a parsing error when only one value was defined for offset_margins
• using the max_deviation default, even though the offset_margins property was already configured.

Many Changes and the Release of 1.0.0

• The documentation can now be found in the wiki.
• Split movement from dock to endstop into seperate x and y moves.
• Add option to wiggle after nozzle probing (thanks to poernahi).
• The "nozzle_xy_position" is now optional and defaults to "safe_z_home" position
  (inspired by whi-tw).
• The "switch_xy_position" is now also optional and can be replaced by the new
  "switch_xy_offsets" parameter, which adds the offsets to the nozzle position instead.
• The deprecated separated x and y parameters for the positions are now removed.
• The offset result is now output with the underlying formula.
• Likewise, a new z position_endstop is output based on the current offset. This can be used
  as a reference point for adjusting the configuration.
• The clearance is deprecated and is replaced by the safe_z_home due to the change in
  behavior. The safe_z_home is now an absolute z position to move to.
• The max_deviation is deprecated and is replaced by the offset_margins parameter which
  takes one value like the max_deviation or two values as min,max.
• Add new Command CALCULATE_SWITCH_OFFSET for a manual estimation of the switch-offset.
• The installation script can now add the update manager section to Moonraker and has an
  uninstall option.

❗ACTION NEEDED:

• Move from clearance to safe_z_home
• Move from max_deviation to offset_margins and fine tune the values.
• Change to combined position parameters if still separated parameters for x and y are used.

Dock on Error, Probing Consistency, Improved Probe Check

• The probe is now docked again before raising an error, if end_gcode is used (thanks to top-gun)
• Probings are more consistent now as the probing sequence is also applied for the bed probing
• More secure: the check for an attached probe is now after the movement to the probing site

No more a dummy service

The system dummy service is not necessary anymore with the current Moonraker version.
Please update to this version, update Moonraker, adapt the moonraker.conf and execute the install.sh script again!

Probe on bed where you want and less configurations

• CAUTION: The X and Y position configurations are now merged to a combined X,Y parameter,
  Please update your Configuration!
• The CALIBRATE_Z command has an optional parameter for the probing position on the bed
• The restriction for a relative reference index in the "bed_mesh" section is removed
• Some other small changes from the failed Klipper PR are merged back now
• Example configurations are removed because they were just examples and confused many people