v0.0.69

• Reorganized access modifiers in OllamaChat::Dialog, making ask? public
  and moving other methods to private.
• Moved links, debug, config=, and config from public to private in
  OllamaChat::Chat.
• Added a class‑level config accessor via Tins::Concern in
  OllamaChat::ConfigHandling.
• Added a private config= method in OllamaChat::ConfigHandling to write to
  the class‑level config.
• Kept a public config method that returns the class‑level config.
• Added private visibility to several modules (Clipboard, Conversation,
  Dialog, DocumentCache, History, InputContent, MessageEditing,
  ModelHandling, ServerSocket) and removed it from ToolCalling.
• Added a tool_function(name) helper to OllamaChat::ToolCalling for
  centralized tool config lookup.
• Updated switch messages in OllamaChat::Switches to use lower‑case “support”
  (“Tools support enabled.” / “Tools support disabled.”).
• Introduced OllamaChat::ConfigHandling module providing display_config,
  fix_config, and edit_config methods.
• Updated the /config command to accept an optional edit argument and
  dispatch to edit_config or display_config.
• Added helper methods tool_configured?, tool_registered?, and
  tool_enabled? to OllamaChat::ToolCalling for cleaner tool state checks.
• Simplified Fetcher#fetch signature to fetch(url, opts = {}) and updated
  documentation accordingly.
• Added guard in FollowChat to skip execution of disabled tools and record an
  error in @chat.tool_call_results.
• Extended the /tools command to accept on/off arguments to enable or
  disable tool support globally.
• Added a tools_support switch in OllamaChat::Switches reflecting
  config.tools.enabled.
• Refactored configuration to use enabled: and functions: under tools: in
  the default config.
• Added tools_support.show to OllamaChat::Information to display the
  current tool support status.