Manage NONMESH entries in gcode

[Hikarinaka]

Is your feature request related to a problem? Please describe

The preprocess cancellation utility have a problem with support structures in Cura. This is what is written in the description: "Cura sliced files have all support material as a single non-mesh entity. This means that when canceling an object, it's support will still print".

Describe the solution you'd like

I suggest removing the NONMESH tags from the code before running that utility.

This is the changes I suggest to make in KlipperPreprocessor.py script:
-add a new checkbox that enables deleting ";MESH:NONMESH" strings, effectievely including support structures into corresponding objects
-actually track the strings and remove that entries before calling the preprocess cancellation

add this to the settings in getSettingDataString def

                "add_nonmesh_entry_remove":
                {
                    "label": "Remove NONMESH entries",
                    "description": "This setting removes the NONMESH entries from gcode, such that Klipper doesn't treat supports as separate objects and supports are cancelled along the pbject.",
                    "type": "bool",
                    "default_value": false
                },

in the prepare script def:

    def prepare_temp_file(self, data: List[str], work_dir: str) -> Tuple[str, int]:
        Logger.log("d", "Initial run...")

        add_timelapse_take_frame: bool = self.getSettingValueByKey("add_timelapse_take_frame")
# new line that applies new checkbox
        add_nonmesh_entry_remove: bool = self.getSettingValueByKey("add_nonmesh_entry_remove")

        filename = os.path.join(work_dir, "work.gcode")
        total_layers = 0

        with open(filename, 'w') as work_file:
            for index, layer in enumerate(data):
                if index:
                    work_file.write(";CURA_DATA_SPLIT_HERE\n")

                lines = layer.split("\n")

                for line in lines:
                    if line.startswith(';LAYER:'):
                        total_layers += 1
                        if add_timelapse_take_frame:
                            work_file.write("TIMELAPSE_TAKE_FRAME\n")
#The nrat line is current code, just disabled 
#                   work_file.write(line + "\n")
#start NONMESH excluding
                    if add_nonmesh_entry_remove:
                        if not line.startswith(';MESH:NONMESH'):
                            work_file.write(line + "\n")
                    else:
                        work_file.write(line + "\n")
#End nonmesh exclusion injection

    

        Logger.log("d", "Total layers found: %d", total_layers)

        return filename, total_layers

Describe alternatives you've considered

No response

Additional information

No response