[ScottishTapWater]

Summary

• Add Power<TExponent>.Of(quantity) for existing hex, negative, and fraction type encodings, including explicit C# aliases.
• Generate ordinary quantity result types, with exponent zero returning double, and support nested arithmetic and inferred locals.
• Reuse TypeSystemNumberCodec through a Roslyn symbol adapter for number decoding.
• Separate power discovery and emission, and preserve original exponent types while reducing result dimensions.
• Require the library's runtime types during discovery and report missing or ambiguous references clearly.

English-name parsing and named convenience methods remain separate follow-up work.

Verification

• Tests written before implementation.
• All 518 tests pass: 314 core, 203 Roslyn, and 1 packaged-consumer integration test.
• Build succeeds with no warnings; formatting and diff checks pass.
• Independent C# production and test reviews are clean, including test ownership and class responsibility checks.