Add Visualization tab to simulate.

Also:
- Increased label width in mjUI tight theme spacing.
- Added `mjITEM_EDITFLOAT` for editing float values.
- Move mjUI numpad key codes to header file.
PiperOrigin-RevId: 535839953
Change-Id: Ibdc0a9a20be514caa5b487211212ed6f5b8a6ba9

introspect/enums.py

@@ -654,8 +654,9 @@ ENUMS: Mapping[str, EnumDecl] = dict([
              ('mjITEM_SLIDERNUM', 9),
              ('mjITEM_EDITINT', 10),
              ('mjITEM_EDITNUM', 11),
-             ('mjITEM_EDITTXT', 12),
-             ('mjNITEM', 13),
+             ('mjITEM_EDITFLOAT', 12),
+             ('mjITEM_EDITTXT', 13),
+             ('mjNITEM', 14),
          ]),
      )),
 ])