chore(rust): bump crate version to 1.5.1 and enhance metadata/documentation

- Update Cargo.toml version from 1.5.0 to 1.5.1 (patch release for metadata changes)
- Enhance package description: emphasize high-performance, add RGB/YUV workflows, clarify video file support
- Refine keywords: camera, webcam, capture, video, ccap for better discoverability
- Improve README.md: clarify package vs crate naming, enhance onboarding, add comprehensive examples
- Add platform-specific notes for video playback support (Windows/macOS)

No functional code changes. Metadata and documentation improvements only.
Related to crate branding and SEO optimization.

Author: wysaid

bindings/rust/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "ccap-rs"
-version = "1.5.0"
+version = "1.5.1"
 edition = "2021"
 rust-version = "1.65"
 authors = ["wysaid <this@wysaid.org>"]