added .editorconfig

.editorconfig

@@ -0,0 +1,23 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{hpp|cpp|lua|yml}]
+indent_style = space
+indent_size = 2
+
+[*.py]
+indent_style = space
+indent_size = 4
+
+[*.js]
+charset = utf-8
+indent_style = space
+indent_size = 2
+
+[**CMakeLists.txt]
+indent_style = space
+indent_size = 2