feat: disable InputBox in TUI while waiting for tool call results

test: remove error display test file

fix(tui): add text wrapping to prevent error message overflow

Add landing page link to README and repo description

Move landing page to docs directory for GitHub Pages

Add GitHub Pages landing page

feat: remove console frontend, use TUI only

fix(tui): ensure Ctrl+C immediately exits program

fix(tui): resolve double Ctrl+C issue by removing signal handler conflict

fix(tui): render entire error messages in red

fix(tui): handle LLM errors gracefully without quitting

feat(tui): keep input box visible with disabled state and spinner when waiting

chore: remove demo and test files

Merge branch 'develop'

feat(ui): improve TUI styling and layout with responsive design