dem-stitcher v2.5.7

Fixed

• Check for Earthdata credentials in netrc (adapted from Joe Kennedy/Forrest Williams) resolving isse #83
  • when no credentials in netrc are present when requesting data for nasadem or srtm_v3, there is a human readable error instructing user to update their ~/.netrc.
• Updates some ruff linting
  • Ensures ruff in environment.yml
  • Ensure single quotes for consistency.