fix(isthmus): support expressions in Sort#322

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yassram wants to merge 4 commits intosubstrait-io:mainfrom yassram:yr/isthmus-sort-expressions-192

+227-6

Commits on Jan 6, 2025

fix(isthmus): support expressions in Sort
yassram
committed

Commits on Jan 7, 2025

test(isthmus): additional tests for substrait to Calcite with Sort
yassram
committed

Commits on Jan 8, 2025

test(isthmus): test (ComplexSortTest) adjustments
yassram
committed

Commits on Jan 9, 2025

test(isthmus): add docstring to CollationRelWriter - pr suggestion
yassram
committed