Add .editorconfig

.editorconfig

@@ -1,4 +1,38 @@
-[*.cs]
+root = true
 
+[*]
+charset = utf-8
+insert_final_newline = true
+
+[*.{sln,cs}]
+# VS defaults to utf-8 with BOM -- let's not create more merge conflicts
+# XXX: csproj files dont't have a BOM for some reason?
+charset = utf-8-bom
+
+[*.cs]
+indent_style = space
+indent_size = 4
+csharp_prefer_braces = when_multiline:warning
+csharp_indent_case_contents_when_block = false
 # CS1591: Missing XML comment for publicly visible type or member
 dotnet_diagnostic.CS1591.severity = none
+
+[*.{html,xml,csproj}]
+indent_style = space
+indent_size = 2
+
+[*.{sh,ps1}]
+indent_style = space
+indent_size = 2
+
+[*.py]
+indent_style = space
+indent_size = 4
+
+[*.{js,json}]
+indent_style = space
+indent_size = 2
+
+[*.lua]
+indent_style = space
+indent_size = 2