- update sensor->status.contrast when setting contrast (consistent with most other settings like hmirror)
- initialize sensor->status.contrast to the actual default (50) rather than 0, which is invalid
- Add sensor GC2145 GC0308 GC032A
- Make xclk driver more standard
- Update README.md
- Add an option to adjust the DMA buffer size
Co-authored-by: zhouli <zhouli@espressif.com>