feat(ui-settings): add an About section with company copy and version check

Registers a new `settings.section` (id `about`) in ui-settings-general that
introduces PineSound, names the product build, shows the current version, and
offers a check-updates control (a client-side placeholder comparing against a
known-latest constant pending a real update channel). Adds a 16px info icon to
ui-primitives and wires the section into the settings nav. Tests cover the
registration and the About component; READMEs and translation-pairing hashes
are updated.

Co-Authored-By: Claude <noreply@anthropic.com>

packages/client/ui-primitives/tests/icons.client.spec.tsx

@@ -16,8 +16,8 @@ const icons = Object.fromEntries(
 const iconNames = Object.keys(icons)
 
 describe('ic_ds_ icon set', () => {
-  it('exports the full icon set (46 deepsuite + 20 figma extracts + four product glyphs outside those sets)', () => {
-    expect(iconNames.length).toBe(70)
+  it('exports the full icon set (46 deepsuite + 20 figma extracts + product glyphs outside those sets)', () => {
+    expect(iconNames.length).toBe(71)
   })
 
   it.each(iconNames)('%s renders an svg with currentColor fills and no hardcoded palette', (name) => {