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🔧 Enhancements for Assignment

This fork adds support for:

  • ByteSize Token – Parses values like "10KB", "2MB", "1.5GB"
  • TimeDuration Token – Parses values like "100ms", "2s", "5min"
  • New Directive aggregate-stats:
    • Usage:
      aggregate-stats :col1 :col2 total_bytes total_time
      
    • Aggregates total size and time from selected columns
    • Supports output in MB, GB, seconds, etc.

Files Modified:

  • Directives.g4 (Lexer & grammar)
  • ByteSize.java, TimeDuration.java (Token extensions)
  • aggregate-stats.java (new directive)
  • Unit tests for new tokens and directive

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