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/filesystem.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2025 sqlmap developers (https://sqlmap.org)
+See the file 'LICENSE' for copying permission
+"""
+
+from lib.core.exception import SqlmapUnsupportedFeatureException
+from plugins.generic.filesystem import Filesystem as GenericFilesystem
+
+class Filesystem(GenericFilesystem):
+    def readFile(self, remoteFile):
+        errMsg = "on Snowflake it is not possible to read files"
+        raise SqlmapUnsupportedFeatureException(errMsg)
+
+    def writeFile(self, localFile, remoteFile, fileType=None, forceCheck=False):
+        errMsg = "on Snowflake it is not possible to write files"
+        raise SqlmapUnsupportedFeatureException(errMsg)