feat: integrate SimpleCADAPI 2.0.2 CAD workflows

SimpleCADAPI/docs/api/get_unit.md

@@ -0,0 +1,17 @@
+# get_unit
+
+## API Definition
+
+```python
+def get_unit(value: UnitLike) -> Unit
+```
+
+*Source: units.py*
+
+## Import Surface
+
+- top-level: `from simplecadapi import get_unit`
+
+## Description
+
+Resolve a built-in unit name/alias or return an existing ``Unit``.