update .editorconfig to template

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = crlf
+indent_size = 4
+insert_final_newline = true
+
+[{*.{c,d,h,py,sh},Makefile}]
+max_line_length = 80
+
+[Makefile]
+indent_style = tab
+
+[*.{c,h}]
+trim_trailing_whitespace = true