Cleanup

- Style

- Rename getTMP() -> getTemperature()
- Rename enum TMP -> Temperature
- Rename enum TMP_UNIT -> TemperatureUnit
- Rename enum FAN -> Fan
    - Rename NUM_KEYS -> COUNT
- Rename enum SMC_KEY -> SMCKeyMisc

- Make enums private, these can’t be used by the user anyway, so they shouldn't
  see them (though this may change for some of them though down the road)
    - Fan - remove some extra keys, not needed. There just a placeholder
    - SMCKeyMisc
    - DataType