Model MySQL DROP object lists

[minleejae]

Summary

• parse DROP DATABASE, DROP PROCEDURE, and DROP TRIGGER as typed Drop statements
• support comma-separated table and view targets
• expose a typed object kind and the complete target list through getObjectType() and getNames()
• retain getType() and getName() as compatible accessors for existing callers
• update deparsing, validation, table discovery, and statement visitors to process every target

Validation

• ./gradlew test spotlessCheck checkstyleMain checkstyleTest
• parser generation remains at the baseline 11 warnings
• database, procedure, trigger, multi-table, and multi-view forms were created and dropped successfully against MySQL 8.4

PR checklist

• One cohesive DROP AST change
• Structured object kind and target list; no SQL reparsing
• Existing single-target API remains compatible

[manticore-projects]

Thank you very much!