Goals and Limits as threshold for each nutrient

[Dilden]

The original idea for goals and limits was to apply goals to certain nutrients and limits to others. For instance, protein had a goal and sodium had a limit. Instead, each nutrient should have both a goal (minimum) and limit (maximum). Goals and limits should instead be re-worked to allow for a threshold to be set with both an upper and lower limit for each nutrient tracked.

Users can aim for that self-set threshold instead of a single number, which is probably better but idk.