This pull request involves significant changes to the README.md file of the Purl project. The changes aim to provide a clearer and more concise description of Purl, its features, and its usage. The most important changes include a rewritten project description, a restructured features section, and expanded usage examples.

Project Description:

• The opening paragraph of the README.md file has been rewritten to provide a more concise and informative description of Purl. It now emphasizes Purl as a command-line utility for text file parsing and manipulation, offering a modern alternative to traditional sed and perl one-liners.

Features Section:

• The features section has been restructured and rewritten. It now focuses on features such as accepting standard input, flexible exclusions, search refinement, case insensitivity, in-place editing, colored output, and custom replacements.

Usage Examples:

• The usage examples section has been significantly expanded. It now includes examples of using Purl with multiple files, using the -filter option, filtering input with multiple criteria, excluding lines with multiple patterns, using the -i option for case-insensitive searches, and integrating with Git, Grep, and Xargs.