Add example to readme

[liamhuber]

No description provided.

[github-actions]

👈 Launch a binder notebook on branch pyiron/pyiron_snippets/dir_readme

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.43%. Comparing base (df165d0) to head (50bdf3d).
⚠️ Report is 2 commits behind head on directory_context.

Additional details and impacted files

@@                Coverage Diff                 @@
##           directory_context      #72   +/-   ##
==================================================
  Coverage              95.43%   95.43%           
==================================================
  Files                     16       16           
  Lines                    613      613           
==================================================
  Hits                     585      585           
  Misses                    28       28           

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[jan-janssen]

Looks good to me