assignment1 completed

[shrija-sharma]

Byte Size and Time Duration Parsers with Aggregation Support
This PR introduces comprehensive support for parsing and aggregating byte size and time duration values in Wrangler, making it easier to work with file sizes and time measurements in data pipelines.

Key Features Added

1. Token Types and Parsing Classes
   Added BYTE_SIZE and TIME_DURATION token types to the TokenType enum
   Implemented ByteSize class to parse values like "10KB", "1.5MB", "4.2GB"
   Implemented TimeDuration class to parse values like "100ms", "2.5s", "1.5h"
2. Unit Conversion Utilities
   Support converting between byte units (B, KB, MB, GB, TB, PB)
   Support converting between time units (ns, ms, s, m, h, d)
   Proper handling of fractional values (e.g., "1.5MB", "2.5s")
3. Enhanced Directives
   Added aggregate-stats directive for statistical analysis of byte sizes and time durations
   Comprehensive validation and error handling for malformed inputs
   Case-insensitive unit parsing for better usability
4. Documentation and Testing
   Comprehensive unit tests for all new functionality
   Updated documentation with examples and usage guidelines
   JavaDoc for all public methods and classes

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[shrija-sharma]

Assignment1 Completed