Replace built-in multi query parser with nextras/multi-query-parser

[JanTvrdik]

Summary

• Adds nextras/multi-query-parser as a dependency
• Replaces the hand-rolled 75-line SQL parser in BaseDriver::loadFile() with calls to IMultiQueryParser::parseFile()
• Adds abstract createMultiQueryParser() to BaseDriver, implemented by MySqlDriver (→ MySqlMultiQueryParser) and PgSqlDriver (→ PostgreSqlMultiQueryParser)
• Updates unit tests to use the library's parser and adjusted expected values (the library trims leading whitespace/comments from queries)

Test plan

• All 26 unit tests pass
• Integration tests with MySQL
• Integration tests with PostgreSQL

[Copilot]

Pull request overview

This pull request refactors the SQL parsing logic by replacing a hand-rolled 75-line SQL parser with the external nextras/multi-query-parser library. The change simplifies the codebase by delegating complex SQL parsing logic to a dedicated library that handles MySQL and PostgreSQL syntax differences, including features like DELIMITER statements, dollar-quoted strings, and comment handling.

Changes:

• Adds nextras/multi-query-parser (v2.0) as a dependency
• Introduces abstract createMultiQueryParser() method in BaseDriver, implemented by MySqlDriver and PgSqlDriver with their respective parser classes
• Simplifies BaseDriver::loadFile() from 75 lines to ~13 lines by delegating to the library's parseFile() method
• Updates unit tests to mock the new parser method and adjusts expected query values to reflect the library's behavior of trimming leading whitespace/comments

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
composer.json	Adds nextras/multi-query-parser version ^2.0 as a required dependency
src/Drivers/BaseDriver.php	Removes hand-rolled parser, adds abstract createMultiQueryParser() method, simplifies loadFile() to use library's parser
src/Drivers/MySqlDriver.php	Implements createMultiQueryParser() returning MySqlMultiQueryParser instance
src/Drivers/PgSqlDriver.php	Implements createMultiQueryParser() returning PostgreSqlMultiQueryParser instance
tests/cases/unit/BaseDriverTest.phpt	Updates test mocking to use MySqlMultiQueryParser, adjusts expected values for trimmed whitespace, removes duplicate test case

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