Add OV3640 3MP sensor driver support

[Kevincoooool]

Summary

• Add OV3640 driver (detect/init, QVGA init table, JPEG/RGB565/YUV support)
• Detect OV3640 family PID 0x3640-0x364F (e.g. 0x364C) on SCCB 0x3C
• Use OV3640-specific mirror/flip registers (0x307c/3090/3023) per application notes
• Image tuning via SDE registers: AWB, brightness, contrast, saturation, sharpness, effects, AE level
• Optional module vendor power-save: PWCOM1 bypass, MCU sleep, EIS off
• Register OV3640 probe before OV3660 (same SCCB address)

Test plan

• OV3640 module (PID 0x364C) detected on ESP32-S3
• QVGA RGB565 preview on LCD
• set_vflip / set_hmirror / set_whitebal / set_brightness APIs verified
• Reviewer test with OV3640 and OV3660 modules if available

[Kevincoooool]

@me-no-dev Hi there, could you please push this PR forward if it looks good. Please let me know if there are any other thing need to fix before it merge. Appriciated.