Introduce hook factories for enums

[Tinche]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #705 will improve performance by 10.54%

_{Comparing tin/enum-factories (bcd7a80) with main (6941413)}

Summary

⚡ 3 improvements
✅ 51 untouched

Benchmarks breakdown

	Benchmark	BASE	HEAD	Efficiency
⚡	test_unstructure_simple_int_enum[MsgspecJsonConverter]	27.4 µs	24.8 µs	+10.39%
⚡	test_unstructure_simple_enum[MsgspecJsonConverter]	27.2 µs	24.6 µs	+10.53%
⚡	test_structure_simple_enum[BaseConverter]	30.1 µs	27.2 µs	+10.54%