Geopickr 1.1.0b1 (beta)

Beta pre-release adding multi-format particle export, plus a Place Object fix.

New: export to Dynamo & RELION (issues #1, #2 — pending live-import testing)

• Dynamo .tbl (+ optional .vll volume-list > table reference).
• RELION 5.1 (centered-Å, rlnTomoSubtomogram*) and RELION 3/4 (pixel) star.
• Plus existing .em / STOPGAP .star.
• Export… button in the Place Object and Geometry Picker tabs, and a
  geopickr export command. Coordinates are converted from ChimeraX scene units
  using a chosen tomogram Volume (voxel size / box / origin).
• Angle conventions are cross-validated against ArtiaX (exported Dynamo/RELION
  Euler angles reproduce the same orientation via ArtiaX's own rotation classes).

Fixed

• Place Object: the first opened motive list now has editable visualization
  controls immediately (previously locked until a second list was opened). (#3)

Beta: Dynamo/RELION angle conventions are ArtiaX-validated; the
coordinate-origin conventions (Dynamo 1-indexing, RELION 5 box/2 centering)
still need confirmation against a real Dynamo/RELION import. Please report issues
with example files.

Install: download the wheel and, in ChimeraX:
toolshed install /path/to/chimerax_geopickr-1.1.0b1-py3-none-any.whl