Added "Snowflake" DBMS support (#5980)

* Added SQL queries for 'Snowflake' DBMS

* Added necessary constants for the 'Snowflake' DBMS

* Added the 'Snowflake' DBMS to existing conditional which adds dynamic values to hardcoded statements (queries.xml)

* Added plugin logic for the 'Snowflake' DBMS

* Modified 'dbs' query to include 'ORDER BY'

* Moved 'LIMIT' to appear before 'OFFSET'

plugins/dbms/snowflake/syntax.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2025 sqlmap developers (https://sqlmap.org)
+See the file 'LICENSE' for copying permission
+"""
+
+from lib.core.convert import getOrds
+from plugins.generic.syntax import Syntax as GenericSyntax
+
+class Syntax(GenericSyntax):
+    @staticmethod
+    def escape(expression, quote=True):
+        """
+        >>> Syntax.escape("SELECT 'abcdefgh' FROM foobar") == "SELECT CHR(97)||CHR(98)||CHR(99)||CHR(100)||CHR(101)||CHR(102)||CHR(103)||CHR(104) FROM foobar"
+        True
+        """
+
+        def escaper(value):
+            # Convert each character to its ASCII code and wrap with CHR()
+            return "||".join(f"CHR({ord(c)})" for c in value)
+
+        return Syntax._escape(expression, quote, escaper)