Capture: argus backend for device source

[ladvoc]

Add NVIDIA Jetson CSI camera source for supported hardware.

Closes BOT-411

[github-actions]

Changeset incomplete

This PR's changeset is missing version bumps for packages that are affected by the change. The following packages still require a bump:

• libargus-sys

Already covered:

• livekit-capture (minor)
• livekit-ffi (minor)

A package must be bumped when its own files change, and whenever a package it depends on is bumped (so downstream consumers get a matching release).

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[alan-george-lk]

AI-assisted review flag:

P1: source-device-argus references NativeBuffer::from_dmabuf, DmaBufPixelFormat, and remove_dmabuf_surface_cache_entry, but this PR does not include the corresponding libwebrtc/webrtc-sys API changes. A Linux build with --features source-device-argus will therefore fail to compile. Please include or depend on the DMA-BUF native-buffer API change; when using its current signature, wrap the release closure in Box::new(...) as well.