feat(ui): render every application template except the loading screen as a Vue view

The scene chrome, cockpit, Display controls, command dock, layer panels,
Context rail, welcome card and Provider Settings move verbatim into
src/ui/views and mount into their hosts before the page is translated and
wired. Each view renders the same elements, attributes and text as its
template; Vue keeps whitespace between elements as one space, and no view
markup sits under a white-space: pre rule.

Template asset URLs stay literal, view files are left out of Prettier so
the markup is not reflowed, and the Node component loader moves to build/
and is exported as build/register-vue for host test runners. Hosts that do
not initialize Core's locale pass localePicker: false instead of editing
the markup.

src/app/controls.js

@@ -7,7 +7,8 @@ import { t } from '../i18n/index.js';
 /**
  * Construct the existing controls and camera presentation. `initialShareCode`
  * opens a share code (the `<code>` of `/share/<code>`) at start-up, for a host
- * whose address does not carry one.
+ * whose address does not carry one. `localePicker: false` removes the language
+ * picker, for a host that does not initialize Core's locale.
  */
 export function createApplicationControls({
   scene: { viewer, mapStackController, operations },
@@ -18,6 +19,7 @@ export function createApplicationControls({
   placeSearch,
   defer,
   initialShareCode = null,
+  localePicker = true,
 }) {
   // Initialize the style manager (post-processing, HUD, locations, share links)
   const styleManager = new Controls(viewer, {
@@ -34,6 +36,7 @@ export function createApplicationControls({
     placeSearch,
     // A share code to open at start-up instead of the page's address.
     initialShareCode,
+    localePicker,
   });
   defer(() => styleManager.orbitController.stop());
   defer(() => styleManager.hud.destroy());