Changes

Added

• The unapply subcommand to remove previously applied license headers. Handles shebangs and correctly identifies headers marked during application.
• The initial README.md with project summary, usage examples, configuration details, and build instructions.

Removed

• The --in-place argument and configuration option from the apply command. File modification is now the default and only behavior for apply.

Fixed

• Configuration file name from lichen.toml to .lichen.toml in documentation, error messages, and loading logic.
• Example toml file (excludes) to (exclude)
• Typo in Commands::Unapply enum variant.