Canonical registry of WASM-backed algorithm adapters for Ex4pm.Engine.Wasm.

Each entry names an algorithm_id (an atom, also used as the generated adapter module's file basename under lib/ex4pm_engine/wasm/) and the export symbol the admitted WASM artifact exposes for it. New entries are added by generating an adapter module with mix ex4pm.engine.gen.adapter <algorithm_id> (see Mix.Tasks.Ex4pm.Engine.Gen.Adapter), following the pattern established by Ex4pmEngine.Wasm.Mean.