feat: add rule for consistent indentation

Author: IShix-g

.editorconfig

@@ -133,6 +133,8 @@ dotnet_diagnostic.SA1101.severity = none
 dotnet_diagnostic.SA1111.severity = none
 # Use string.Empty for empty strings
 dotnet_diagnostic.SA1122.severity = warning
+# Elements should have the same indentation
+dotnet_diagnostic.SA1137.severity = warning
 # Using directives should be placed correctly (either top of file or inside namespace).
 dotnet_diagnostic.SA1200.severity = none
 # Static elements should appear before instance elements.