Add printer definitions for Sovol SV08.

[sesse]

The SV08 (or SV-08; nomenclature is not completely consistent) is a relatively new printed based on Voron 2.4, running Klipper. This adds printer, extruder and material definitions for it, based on the voron2_base definitions plus Sovol's published profiles for Orca Slicer:

https://drive.google.com/drive/folders/1KWjLxwpO_9_Xqi_f6qu84HRxZi26a_GN

Unfortunately, the included STL model for the platform does not have texture coordinates, so we cannot use the platform texture (unless someone goes to add them manually or otherwise adjusts the model).

The following settings were not carried over, mostly because I could not find any obvious equivalent in Cura:

  - Machine: "retract_before_wipe": [ "0%" ],
    "machine_max_acceleration_extruding": [ "20000" ], 
    "machine_max_acceleration_retracting": [ "5000" ]
    "retract_length_toolchange": [ "2" ],
    "wipe_distance": [ "2" ],
    "retract_lift_below": [ "343" ],
    "thumbnails_format": "PNG",
    "before_layer_change_gcode": "TIMELAPSE_TAKE_FRAME\nG92 E0",

• Filament (using ABS as an example; the exact values differ between the four material profiles):

    "nozzle_temperature_range_low": [ "190" ],
    "nozzle_temperature_range_high": [ "250" ],
    "full_fan_speed_layer": [ "0" ],
    "slow_down_layer_time": [ "4" ],
    "slow_down_min_speed": [ "10" ],
    "overhang_fan_speed": [ "30" ],
    "overhang_fan_threshold": [ "25%" ],
    "temperature_vitrification": [ "60" ],
    "activate_air_filtration": [ "1" ],
    "close_fan_the_first_x_layers": [ "3" ],
    "complete_print_exhaust_fan_speed": [ "60" ],
    "during_print_exhaust_fan_speed": [ "100" ],

• Process: A bunch (e.g. bridge_flow, elefant_foot_compensation, overhang_1_4_speed, etc. etc.), but it's unclear how many are printer-specific and how many are just Orca defaults where Cura wants to do things differently.

The start and end G-code are copied over verbatim, except that it leaves the printer in relative coordinate mode and Cura does not set this explicitly back to absolute, so we need an explicit G90 at the end. (Also, there seems to be a Klipper issue where G90 does not reset extrusion to absolute as well, so we need to send an explicit M82.)

Unfortunately, Cura chooses SS_ as prefix instead of SV08_. I don't know if there is a way to override this; the other Sovol printers seem to have the same issue.

I've tested this with the standard 0.4mm nozzle and ABS/PLA, using the Moonraker plugin. PETG and TPU are untested, in part because the current nozzle is said to be unsafe for PETG. The time estimates from Cura are not all that good, but klipper_estimator helps.

Future work would include supporting the 0.2mm, 0.6mm and 0.8mm nozzles. There are separate profiles for them, with different layer height, support settings, print speeds, etc. -- and then there is a specific PLA/0.2mm profile with lower printing speed and higher fan settings.

Type of change

• Printer definition file(s)

How Has This Been Tested?

• PLA test print
• ABS test print
• PETG print
• TPU print
• 0.4mm nozzle
• 0.2mm, 0.6mm, 0.8mm nozzle

Test Configuration:

• Operating System: Linux

Checklist:

• I have read the Contribution guide

[github-actions]

⚠️ Clang-Tidy found issue(s) with the introduced code (1/1)

No Clang-Tidy warnings found so I assume my comments were addressed

[sesse]

Perhaps someone can add the “Printer definitions” label?

[sesse]

Update in v3: Rebased, some more fan settings have been ported over, filaments have been put in the correct directories,and the PRINT_START macro is given initial bed and nozzle temperatures for the benefit of better mainline Klipper integration.