v0.91.0

• Enhanced IRB time watcher with improved input validation and float conversion
• Reordered columns in line formatter output for better readability
• Replaced ASCII characters with Unicode em-dashes and emojis in formatter
  output
• Moved IRB wrapper classes to dedicated files for better code organization
• Refactored IRB integration by splitting Utils::IRB::Shell into separate
  files
• Improved source location extension to work with all modules that define
  source_location
• Added irb_current_snippet method to retrieve current code snippet from IRB
  server
• Enhanced error handling in IRB server to specifically catch SyntaxError