feat(kit): render the pressed toggles with UiButton

UiButton gains pressedClass, Core's class on a pressed button. The pressed
classes toggle through classList, so classes other code adds survive a
press, a caller's class change keeps them, a renamed pressedClass leaves
the button, and server-rendered markup carries them.

The Display, SDR, Radio and Cockpit enable, Cockpit weather and briefing,
mission replay, Street Level, TR-3B, overlay, voice and CCTV toggles now
render through it with the same ids, classes and aria-pressed values.

scripts/format-scope.json

@@ -1130,6 +1130,8 @@
   "src/ui/kit/UiSegmented.test.mjs",
   "src/ui/kit/UiSlider.js",
   "src/ui/kit/UiSlider.test.mjs",
+  "src/ui/kit/UiButton.vue",
+  "src/ui/kit/UiButton.test.mjs",
   "src/ui/displayPanelActions.test.mjs",
   "src/testSupport/vueDom.mjs",
   "build/vueLoader.js",