Implement support to download files to use in pyrocky examples #35

Pytest Report ✅

2 tests were completed in 37s with 2 passed, 0 failed and 0 skipped.

Test suite	Passed	Failed	Skipped	Time
pytest	2✅			37s

tests.test_examples_download
  ✅ test_examples_download
tests.test_pyrocky
  ✅ test_minimal_simulation