tasks v1.1.0

Changelog

• b752964 add collapse all (-) and expand all (+) functionality
• f8a56c9 add comprehensive test suite with teatest and testify
• 5635390 add delete functionality with 'd' key
• 539c295 add screenshot to readme
• 465dd1a add todo.md file
• 2976146 don't just eat the parsing error in initialModel
• cd39030 fix Unicode character input support
• 8ba8447 fix empty file editing and refactor input handling
• 1ba0121 improve markdown formatting by adding blank lines around section headers
• 78dee6b refactor handleHMode
• 1eb9abf simplify bounds checking by removing redundant conditions
• b22fd5d streamline CLAUDE.md and update with recent features
• be18fd3 update README.md with recent features and fixes
• 0148ea2 update readme
• 9e70250 update todo
• f49daa4 use type switch and slices.Delete