Use compact typed depth-map encoding

[gbin]

Summary

• represent ZED depth frames with CuDepthMap and u16 millimeter samples
• retrieve compact U16_MM frames directly from the SDK
• decode typed physical lengths when projecting point clouds

Verification

• just check-lib
• cargo +stable clippy -p cu-zed --lib -- --deny warnings

Stack:

• core support: Add CuDepthMap sensor payload with typed length samples copper-rs#1231
• ViTFly consumer: Adapt ViTFly to encoded ZED depth maps cu-vitfly#2
• flight-controller consumer: Migrate flight controller to encoded ZED depth maps copper-rs#1244