Add dynamo tbl export

[bbarad]

Support export to dynamo tbl and catalogues to transparently drop into the dynamo geometry-assisted STA workflow.

https://www.sciencedirect.com/science/article/abs/pii/S1047847716301113

and https://www.sciencedirect.com/science/article/pii/S0969212625002254

[bbarad]

Implemented in v1.1.0b1 (https://github.com/baradlab/Geopickr/releases/tag/v1.1.0b1).

Export is available via the Export… button (Place Object / Geometry Picker tabs) and the geopickr export command. Euler-angle conventions are cross-validated against ArtiaX's rotation classes; coordinate-origin conventions follow ArtiaX/standard usage.

Leaving this open and labelled pending testing until the output is confirmed against a live import on real data. Please attach an example if you hit a mismatch.