feat: rework migration file parsing

Summary

• feat: rework migration file parsing

• parse everything before executing
• support multiline sql queries
• user-friendly error messages

• feat: util::Lexer add support for SQL style quote escaping

• fix: bugs in picodata::util::Lexer

---

• Close #...

• Cherry-pick to: none

• Docs follow-up: docs#267 (closed)

• Follow-up for !1000 (merged)