Cursor Ring +

## 1.6.3
- Added independent thickness controls for each ring type:
  - main ring thickness
  - cast ring thickness
  - secondary resource ring thickness
- Added a `Ring margin` control and reworked ring layout spacing so cast/resource rings are solved outward by geometry and maintain separation from inner rings as thickness changes.
- Updated defaults for the new spacing controls:
  - cast ring thickness default: `25`
  - secondary resource ring thickness default: `15`
  - ring margin default: `2`