feat: add view/edit support for MySQL stored procedures

[probeldev]

This PR adds the ability to view and edit stored procedures for MySQL/MariaDB directly from the Explorer.

• Added get_procedure_definition to the ProcedureInspector protocol and base adapter.
• Implemented SHOW CREATE PROCEDURE retrieval in MySQLBaseAdapter (used by both MySQL and MariaDB).
• Added ExplorerSchemaService.get_procedure_definition.
• Selecting a procedure in the Explorer and pressing s now opens the procedure DDL in the query editor and shows its properties in the results panel.
• MySQL/MariaDB DDL is wrapped in DELIMITER $$ blocks and prefixed with DROP PROCEDURE IF EXISTS, so the body can be edited and re-executed without manual delimiter handling.
• Added client-side DELIMITER support to the multi-statement parser, ensuring procedure bodies containing semicolons are treated as a single executable statement.
• Fixed TreeOnObjectState so that procedure nodes get the s Show Info binding.
• Added unit tests for the new adapter, explorer state, object info, DELIMITER splitting, and schema-change detection.

Screen.Recording.2026-07-07.at.08.25.56.mov