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.

Cargo.lock

@@ -881,6 +881,14 @@ dependencies = [
  "gpui",
 ]
 
+[[package]]
+name = "clipbin-media"
+version = "0.1.0"
+dependencies = [
+ "clipbin-core",
+ "ffmpeg-next",
+]
+
 [[package]]
 name = "clipbin-obs"
 version = "0.1.0"
@@ -1680,6 +1688,31 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "ffmpeg-next"
+version = "9.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6380599799e175191eb7ffe82c97f36a2a90a36cbc54c738a903e5287d7f516a"
+dependencies = [
+ "bitflags 2.13.2",
+ "ffmpeg-sys-next",
+ "libc",
+]
+
+[[package]]
+name = "ffmpeg-sys-next"
+version = "9.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b939bf79dd5949412a4b81cfe21a07f48ea21b47fcbb5f57816c8c2de5ae30b"
+dependencies = [
+ "bindgen 0.72.1",
+ "cc",
+ "libc",
+ "num_cpus",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "filedescriptor"
 version = "0.8.3"
@@ -5965,6 +5998,12 @@ dependencies = [
  "sval_serde",
 ]
 
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
 [[package]]
 name = "version_check"
 version = "0.9.5"