Cache Hypothesis examples dir in CI #1992

Job	Run time
cache-pixi-lock / Generate output	1m 27s
Unit tests: ubuntu \| pixi run -e test-py313 tests	3m 44s
Unit tests: ubuntu \| pixi run -e test-minimum tests	3m 30s
Unit tests: ubuntu \| pixi run -e test tests	2m 45s
Unit tests: ubuntu \| pixi run -e test-py311 tests	3m 33s
Unit tests: windows \| pixi run -e test tests	7m 23s
TypeChecking: pixi run typing	0s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
merge-test-artifacts	0s
	22m 22s

Provide feedback