feat: add firebird triggers

plugins/dbgate-plugin-firebird/src/backend/sql/triggers.js

@@ -0,0 +1,12 @@
+module.exports = `
+SELECT
+    TRIM(rtr.RDB$TRIGGER_NAME) as PURENAME,
+    TRIM(rtr.RDB$RELATION_NAME) as TABLENAME,
+    rtr.RDB$TRIGGER_TYPE as TRIGGERTYPE,
+    TRIM(rel.RDB$OWNER_NAME) AS SCHEMANAME
+FROM
+    RDB$TRIGGERS rtr
+JOIN RDB$RELATIONS rel ON rtr.RDB$RELATION_NAME = rel.RDB$RELATION_NAME
+WHERE rtr.RDB$SYSTEM_FLAG = 0
+ORDER BY rtr.RDB$TRIGGER_NAME
+`;