feat: truncate tool result output

fix: add click dependency

feat: skip duplicate artifacts

feat: add unique color and newline for tool_result artifacts

Handle server disconnections gracefully in streaming

feat: add double Ctrl+C to exit with 0.5s threshold

refactor: separate CLI logic into modules and add persistent history

feat: Add interactive mode with slash commands and autocompletion

feat: add followup

style(cli): enhance stream_task output styling and update CLI messages

feat(cli): add streaming task output with follow-up prompts

fix(a2a_cli): update agent-url default and add task echo; remove unused payload; add main guard; bump dependencies versions

feat: show status msgs

initial commit