more generic options

src/extensions/membrane-orientation/representation.ts

src/mol-model-props/computed/membrane-orientation.ts

src/mol-model-props/computed/membrane-orientation/ANVIL.ts

src/mol-model-props/computed/membrane-orientation/OPM.ts

...model-props/computed/membrane-orientation/anvil/common.ts

src/tests/browser/render-structure.ts