Updating node descriptions 2

[hwahlstrom]

Purpose

Updating GeometryUI, UnitsUI, Watch3DNodeModels library node descriptions to adhere to node description content pattern.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

Updated descriptions for the Geometry.ExportToSAT, Convert By Units, Parse Unit Input, and Watch 3D nodes to improve clarity and consistency.

Reviewers

@Amoursol

FYIs