v0.0.70

• Added a new generate_password tool that creates cryptographically secure
  passwords with configurable length, entropy bits, alphabet type, and
  character set options.
• Updated the tins gem dependency to version 1.52 to support the new password
  generation logic.
• Added a get_rfc tool that retrieves RFC documents by ID using a
  configurable URL template.
• Implemented a backup fallback for conversation loading: when no conversation
  file is supplied, the client loads from OC::XDG_CACHE_HOME/backup.json and
  deletes the backup after a successful load.
• Updated configuration handling to save backups to
  OC::XDG_CACHE_HOME/backup.json instead of the current directory.
• Modified MessageList to print file‑existence errors using
  filename.to_s.inspect and to safely remove the backup file with
  FileUtils.rm_f.
• Renamed the environment configuration module from OllamaChat::EnvConfig to
  OC, updating all references accordingly.
• Added new constants OC::OLLAMA::SEARXNG_URL, OC::OLLAMA::REDIS_URL, and
  OC::OLLAMA::REDIS_EXPIRING_URL.
• Updated nested module paths for tools (e.g., OC::OLLAMA::CHAT::TOOLS::JIRA
  and OC::OLLAMA::CHAT::TOOLS::RUN_TESTS_TEST_RUNNER).
• Removed the empty endoflife tool file; its functionality is now provided by
  the get_endoflife tool.
• Updated default_config.yml to include configurations for the new
  generate_password and get_rfc tools.
• Updated the gemspec to register the new tool files and their tests.
• Added comprehensive test suites for both the generate_password and
  get_rfc tools.