v0.0.72

• Introduced OllamaChat::PersonaeManagement module and /persona command
  with subcommands add, delete, edit, list, play, file, info,
  load.
• Added /config reload subcommand to OllamaChat::Chat; handler
  reload_config prompts for confirmation, saves conversation/history, then
  restarts the process.
• Added -p command‑line option (-p PERSONA) to load personas at startup.
• Created OllamaChat::Pager module for pager functionality.
• Created OllamaChat::FileEditing module; refactored edit_config,
  compose, revise_last to use edit_file; added vim(server_name = nil)
  returning OllamaChat::Vim and perform_insert(text:, content:).
• Added LLM‑driven tool insert_into_editor with implementation and tests;
  default configuration now enables confirmation flag for this tool.
• Enhanced copy_to_clipboard tool: accepts optional text parameter,
  includes helper last_message_content, returns true on success, updated
  error messages, added test for custom text.
• Added bytes_written tracking to write_file tool; fixed return hash key.
• Added visual separator for tool output.
• Added save_history call after conversation backup to persist history before
  restart.
• Updated documentation and help messages to reflect new commands and options.
• Updated README and help messages to include /config [edit|reload]
  functionality.