Float, Integer, String and Boolean are missing from the variable Type menu

Steps to reproduce:

1. Create a new project with the Universal 3D template
2. Open Window > Package Management > Package Manager, select Unity Registry and install Visual Scripting
3. Create an empty GameObject and add the Variables component (Add Component > Visual Scripting > Variables)
4. In the Variables component type a name in the (New Variable Name) field and click +
5. Click the Type dropdown of the new variable

Actual results: Float, Integer, String and Boolean are not listed. The menu starts with Vector 3 and Game Object, and searching for "Integer" or "Int32" finds nothing.

Expected results: Float, Integer, String and Boolean are listed and can be selected.

Reproducible with versions: Visual Scripting 1.9.12 (7000.0.0a5, 7000.0.0a10)

Not reproducible with versions: Visual Scripting 1.9.12 (6000.0.85f1, 6000.3.27f1, 6000.6.7f1, 6000.7.0b6, 7000.0.0a1)

Tested on (OS): Windows 11 Pro