update explain query including mssql (#957)

Author: adela-bytebase

mintlify/content/docs/sql-editor/explain-mssql-1.webp

@@ -77,10 +77,17 @@ Otherwise, you can request the exported data
 
 SQL Editor provides an `Explain Query` action to run EXPLAIN on the selected query. You can access it from right click or use the shortcut key `(⌘ + E)` instead of prepending EXPLAIN manually.
 
-For PostgreSQL database, Bytebase also embeds [PEV2](https://github.com/dalibo/pev2) to visualize the plan.
+Bytebase provides visual plan representations for different databases:
 
-![visualize-plan](/content/docs/sql-editor/explain-postgres-1.webp)
-![visualize-plan](/content/docs/sql-editor/explain-postgres-2.webp)
+- **PostgreSQL**: Embeds [PEV2](https://github.com/dalibo/pev2) to visualize the execution plan
+
+    ![visualize-plan](/content/docs/sql-editor/explain-postgres-1.webp)
+    ![visualize-plan](/content/docs/sql-editor/explain-postgres-2.webp)
+
+- **SQL Server**: Provides native graphical execution plan visualization
+
+    ![mssql-visualize-plan](/content/docs/sql-editor/explain-mssql-1.webp)
+    ![mssql-visualize-plan](/content/docs/sql-editor/explain-mssql-2.webp)
 
 ## Batch mode