feat: Add per-segment language detection and dual output files

- Add whatlang for real-time language detection per segment
- Generate .asr.json (basic) and .asrx.json (with language labels)
- Add auto-save progress with configurable interval
- Add resume functionality for interrupted transcriptions
- Add Music/Empty detection and statistics
- Update progress display with unified format
- Add comprehensive Chinese README with usage documentation

Cargo.toml

@@ -22,6 +22,10 @@ anyhow = "1.0"
 
 # 可選：如果 whisper-rs 需要額外的數學運算支持
 ndarray = "0.15"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+lazy_static = "1.4"
+whatlang = "0.16"