ST_Height and ST_Width (or ST_XSize, ST_YSize, ST_ZSize) for geometry

[robe]

We should have an ST_Height and ST_Width for geometry similar to what we already have for raster which would return the bounding box height and width

[robe]

We should decide on name evidently also proposed ST_XSize, ST_YSize, ST_ZSize admittedly that is clearer and has the niceness of not being a breaking change (e.g. ST_Width and ST_Height would overlap with raster thus possibly in some cases resulting in ambiguous if people don't cast their text based geometry representations.

[robe]

Milestone renamed

[strk]

Just stumbled upon lack of this function. I'd be tempted to use ST_Width/ST_Height as we already have that for raster, and that's what I've been typing w/out luck...