Added .editorconfig (#2740)

* Added .editorconfig

* Added json and yml for 2 space indenting

* Added scss for 4 space indenting

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{css,js,json,py,yml}]
+indent_style = space
+
+[*.{js,py}]
+charset = utf-8
+
+[*.{css,py,scss}]
+indent_size = 4
+
+[*.{js,json,yml}]
+ident_size = 2