add stylelint-stylistic (#25285)

Add
[stylelint-stylistic](https://github.com/elirasza/stylelint-stylistic),
autofix all issues with two manual tweaks. This restores all the
stylistic rules removed in Stylelint 15.

web_src/css/modules/normalize.css

@@ -144,9 +144,9 @@ Correct the inability to style clickable types in iOS and Safari.
 */
 
 button,
-[type='button'],
-[type='reset'],
-[type='submit'] {
+[type="button"],
+[type="reset"],
+[type="submit"] {
   -webkit-appearance: button;
 }
 
@@ -206,7 +206,7 @@ Correct the cursor style of increment and decrement buttons in Safari.
 2. Correct the outline style in Safari.
 */
 
-[type='search'] {
+[type="search"] {
   -webkit-appearance: textfield; /* 1 */
   outline-offset: -2px; /* 2 */
 }