transformations

[HelenaLC]

In progress...

	image	label	shape	point
identity	✔	✔	✔	✔
translate	✔	✔	✔	✔
rotate	❌	❌	✔	✔
scale	✔	✔	✔	✔
affine	❌	❌	❌	❌
sequence	✔	✔	✔	✔

Note: transformations for geoarrow-based shapes currently requires realizing into memory... i.e., no delay.