feat: basic ass processing (without style)

internal/config/constants.go

@@ -1,7 +1,7 @@
 package config
 
 // Version stores the current application version
-const Version = "0.5.1"
+const Version = "0.5.2"
 
 // Usage stores the general usage information
 const Usage = `Usage: sub-cli [command] [options]
@@ -17,6 +17,8 @@ const SyncUsage = `Usage: sub-cli sync <source> <target>
   Currently supports synchronizing between files of the same format:
   - LRC to LRC
   - SRT to SRT
+  - VTT to VTT
+  - ASS to ASS
   If source and target have different numbers of entries, a warning will be shown.`
 
 // ConvertUsage stores the usage information for the convert command
@@ -26,4 +28,5 @@ const ConvertUsage = `Usage: sub-cli convert <source> <target>
     .txt	Plain text format (No meta/timeline tags, only support as target format)
     .srt	SubRip Subtitle format
     .lrc	LRC format
-    .vtt	WebVTT format`
+    .vtt	WebVTT format
+    .ass	Advanced SubStation Alpha format`