add global editorconfig

Author: Grsmto

Diff for: .editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+
+[**.js]
+indent_size = 2
+
+[**.css]
+indent_size = 2
+
+[**.html]
+indent_size = 2