[New Feature] Add Custom SpeedType

### Description:
Literal meaning, allow modder to add new SpeedType for TechnoTypes. That would allow more detailed move settings.

### Possible Implementation:
```ini
[SpeedTypes]
1=NewSpeedType

[SOMETECHNO]
SpeedType=NewSpeedType

[Clean] ; Speed Modifier on tiles
NewSpeedType=200%
```