- Rename all source files, headers, and build targets from loreg to lorex
- Add match context struct with pre-allocated state sets for reuse across calls
- Introduce optimization fields in nfa_t: literal prefix/suffix, first character bitmap, alternation dispatch table, anchor flags
- Add benchmark target with -O3 -march=native in Makefile
- Implement bracket_class_t bitmap cache for O(1) character class lookups
- Update README with performance section detailing optimization techniques
- Add coverage/ directory to .gitignore
- Update CHANGELOG to reflect reduced line counts after rename
