Added editorconfig, fixed formatting

.editorconfig

@@ -0,0 +1,19 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Ignore external dependencies
+[/cmake/**]
+charset = unset
+end_of_line = unset
+indent_size = unset
+indent_style = unset
+insert_final_newline = unset
+max_line_length = unset
+tab_width = unset
+trim_trailing_whitespace = unset