FR: add support for HappyHair spoolman integration

[meteyou]

Here the post from @moggiuk with the informations:

For reference, Happy Hare will (in upcoming release) creates these "extra" fields in the spools table:
MMU_NAME_FIELD = 'printer_name'
MMU_GATE_FIELD = 'mmu_gate_map'

E.g. A GET on http://192.168.0.108:7912/api/v1/spool/1, would return the extra fields on the spool_info object like this:

{
  "id": 1,
  "registered": "2023-09-17T08:55:26Z",
  "first_used": "2023-09-17T08:55:01.044000Z",
  "last_used": "2024-06-27T15:28:41Z",
  "filament": {
    "id": 1,
    "registered": "2023-09-17T08:54:03Z",
    "name": "Matte Green",
    "vendor": {
      "id": 1,
      "registered": "2023-09-17T08:51:36Z",
      "name": "eSun",
      "extra": {}
    },
    "material": "PLA - Silk",
    "price": 20,
    "density": 1.25,
    "diameter": 1.75,
    "weight": 1000,
    "spool_weight": 1100,
    "settings_extruder_temp": 210,
    "settings_bed_temp": 70,
    "color_hex": "8CDFAC",
    "extra": {}
  },
  "remaining_weight": 943.4987993892125,
  "initial_weight": 1000,
  "spool_weight": 1100,
  "used_weight": 56.501200610787414,
  "remaining_length": 313808.97483559017,
  "used_length": 18792.375625840086,
  "location": "BigRed @ MMU Gate:0",
  "archived": false,
  "extra": {
    "printer_name": "\"BigRed\"",
    "mmu_gate_map": "0"
  }
}

Would it be possible to check if the mmu_gate_map field exists and if so, add that to the meta information for the tool?

This is very useful because it is possible to map any "logical" tool to any physical "gate" (or slot or lane) on MMU. This extra field will contain that gate if Happy Hare is being used but it would set a place for others to use. Of course if the filed is not found or is -1 (the default) there is no gate assignment and it would be ignored.

Originally posted by @moggieuk in #1946 (comment)