Cava colors

### Feature Description

can you make terminal cava also take colors from matugen? i seen it in many others dotfiles.

### Use Case

_No response_

### Compositor(s)

All compositors

### If Other, please specify

_No response_

### Proposed Solution

_No response_

### Alternatives/Existing Solutions

_No response_

The issue does not name any files, tests, or entry points. Start by locating how terminal cava is integrated and how matugen colors are consumed, then determine the expected color mapping and configuration path. Done means cava uses matugen colors consistently across the supported compositors.

Written by the indexing model from the issue text.