feat: add clipbin-media for reading segments with FFmpeg

One shared FFmpeg binding (ffmpeg-next 9, dynamically linked: the system
FFmpeg on Linux, the OBS-bundled DLLs on Windows) for clip export and
playback, with a probe of segment duration, codec, size and audio tracks.

crates/clipbin-media/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "clipbin-media"
+description = "Reading recorded segments: clip export (remux) and playback decoding, via FFmpeg."
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+publish.workspace = true
+
+[dependencies]
+clipbin-core.workspace = true
+ffmpeg-next = { version = "9", default-features = false, features = ["codec", "format", "software-scaling", "software-resampling"] }
+
+[lints]
+workspace = true