v0.0.78

• Added new patch_file tool for applying unified diff patches to files with
  safety checks, including specs and integration into the tool system.
• Updated DirectoryStructure tool description to clarify that max_depth
  limits the tree height for better LLM understanding.
• Bumped search_ui gem dependency from 0.0 to 0.1, refactored model
  handling using SearchUI::Wrapper.new and updated chooser logic for safer
  method dispatch.
• Enhanced run_tests tool with a path validation whitelist in
  default_config.yml, introducing OllamaChat::Utils::PathValidator and
  updating check_path method to validate against the allowed list.
• Simplified runtime information handling by adding new helper methods:
  runtime_information_values, runtime_information, and updated chat.rb to
  use these for displaying structured runtime data.
• Added default persona name display using the default_persona_name helper,
  updating information output and refactoring reload_default_persona guard
  logic.