Extended Support for Typing in the Symbolic Toolbox

docs/source/api/symbolic/sympyextensions.rst

docs/source/contributing/dev-workflow.md

docs/source/index.rst

docs/source/user_manual/WorkingWithTypes.md

docs/source/user_manual/kernelcreation.md

mypy.ini

src/pystencils/__init__.py

src/pystencils/backend/kernelcreation/context.py

src/pystencils/backend/kernelcreation/freeze.py

src/pystencils/field.py

src/pystencils/jit/cpu_extension_module.py

src/pystencils/jit/gpu_cupy.py

src/pystencils/rng.py

src/pystencils/sympyextensions/__init__.py

src/pystencils/sympyextensions/math.py

src/pystencils/sympyextensions/typed_sympy.py

tests/frontend/test_address_of.py

tests/frontend/test_field.py

tests/frontend/test_typed_sympy.py

tests/kernelcreation/test_spatial_counters.py