Exact-width lookup numerical systems

This is the public entry point for lookup-table numerical formats. It exports the generic codebook representation, the supplied catalog, proved catalog arithmetic, the configured ExecFloat.Codebook carrier, numerical automation, and #float_info support.

Import narrower submodules when defining another codebook family internally.

A codebook is defined by its complete denotation table, so the table is the authoritative format specification. FloatLib does not infer arithmetic from bit width or element type.

Reference

Codebook.denote specifies the meaning of every stored word, including exceptional entries. nearestCode supplies nearest-entry quantization, and catalog arithmetic lives in Codebook.Arithmetic.