Geometry System Refactor: Store labware calibration offsets

[btmorr]

overview

As a user, I want to be able to calibrate labware, with a separate calibration value for each different parent (where a parent is a specific slot, or a specific module in a specific slot).

{
  "default": {
    "offset": [float, float, float],
    "lastModified": <timestamp int>
  },
  "tipLength": float
}

• When calibrating a labware, if the calibration file does not previously exists, load it, set the "default" field, then save
• When calibrating a labware, if the calibration file already exists, create it
• Tipracks should have a tip length offset field
• Each offset should also be paired with a timestamp