import lazy DFA based regex

[hackwaly]

This PR introduces a lazy DFA based regex engine. It will replace the exist slow NFA based regex engine in core.

TODOs

• Add tests
• @string.Regex and @bytes.BytesRegex api surface.
• Add bridge between moonc and regex.
• Moonc ready

[coveralls]

Pull Request Test Coverage Report for Build 2392

Details

• 572 of 802 (71.32%) changed or added relevant lines in 32 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.9%) to 95.589%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/regex_engine/automata/state.mbt	10	11	90.91%
internal/regex_engine/positions.mbt	5	6	83.33%
internal/regex_engine/shared_types/category.mbt	8	9	88.89%
internal/regex_engine/symbol_map/sparse_table.mbt	7	8	87.5%
internal/regex_engine/symbol_map/symbol_map.mbt	27	28	96.43%
internal/regex_engine/automata/mark_slot_map.mbt	7	10	70.0%
internal/regex_engine/automata/delta.mbt	55	60	91.67%
internal/regex_engine/automata/slot_book.mbt	8	14	57.14%
internal/regex_engine/execute.mbt	54	60	90.0%
internal/regex_engine/ast/pattern.mbt	29	39	74.36%

Totals
Change from base Build 2391:	-1.9%
Covered Lines:	11008
Relevant Lines:	11516

---

💛 - Coveralls