Add Transformation algorithm

[nyalldawson]

Exposes the transformation filter for use by wrench

[wonder-sk]

Thanks!

Would it be possible to also add an example to the README?

I was thinking whether the transformation should not be a part of the translate algorithm - so that potentially one could do multiple operations at once - e.g. move the points in some direction, assign correct CRS and save as LAZ.

(Also, one thing that worries me a bit is that "translate" and "transform" algs may get easily mixed up - at least in my head they do 😄 )

Do we want to also provide command line args for the common operations like translation/scale/rotation, so that people do not need to craft the matrices? or that would be a part of QGIS alg implementation? (e.g. las2las has quite impressive list of various -translate* -scale* -rotate* options)

[hobu]

Could you add a feature to add a filter block where all of the filters are streamable? You're quickly getting to supporting pipelines, however 😄