updated to version 0.2.1

Merge pull request #22 from LeoYuanjieLi/curve-operations

bug fix in curveoperations and version bump

feat: complete C# plugin part for Curve Operations

added curve operations

allow to execute C# code

updated to 0.2.0

added advanced geometry operation, closes #21

updated general strategy

updated get rhinoscriptsyntax documentation workflow

added tool to generate image

added get_document_summary and get_objects commands. Got rid of get_document_info.

updated test command

added test in rhino plugin

added pytest to python