convert: add whole workflow-run context to the crate

[simleo]

Now https://w3id.org/ro/terms/workflow-run is a valid JSON-LD context, see ResearchObject/ro-terms@71eec1e

Generated crates now start with:

{
    "@context": [
        "https://w3id.org/ro/crate/1.1/context",
        "https://w3id.org/ro/terms/workflow-run"
    ],

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (3080d51) 97.61% compared to head (632c000) 97.61%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #63      +/-   ##
==========================================
- Coverage   97.61%   97.61%   -0.01%     
==========================================
  Files          12       12              
  Lines        1931     1928       -3     
==========================================
- Hits         1885     1882       -3     
  Misses         46       46              

Files	Coverage Δ
src/runcrate/constants.py	100.00% <ø> (ø)
src/runcrate/convert.py	97.85% <100.00%> (ø)
tests/test_cwlprov_crate_builder.py	99.89% <100.00%> (-0.01%)	⬇️

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