Support BGR888/BGR24 format

## Format Details
- **Type:** BGR (reversed RGB)
- **Description:** 24-bit BGR, 8 bits per channel
- **Color Depth:** Full 8-bit color per channel in BGR order

## Implementation Requirements
- Parse BGR888/BGR24 data from camera stream
- Handle reversed color order compared to RGB888
- Convert to display format if needed

## Parent Issue
Part of #1