Add shared UI package and logo

Widget surface, annotation overlay, whiteboard and video components used by
both the website and the kiosk.

Claude-Session: https://claude.ai/code/session_01SS9F92jb51bMCRCKem6QtD

assets/logo.svg

@@ -0,0 +1,24 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="64"
+  height="64"
+  viewBox="0 0 32 32"
+  shape-rendering="crispEdges"
+  role="img"
+  aria-label="PiStation"
+>
+  <title>PiStation</title>
+
+  <rect x="2" y="4" width="28" height="19" fill="#4f7cff" />
+  <rect x="4" y="6" width="24" height="14" fill="#14181d" />
+
+  <rect x="8" y="8" width="4" height="4" fill="#f4f6f8" />
+  <rect x="14" y="8" width="4" height="4" fill="#f4f6f8" />
+  <rect x="20" y="8" width="4" height="4" fill="#f4f6f8" />
+  <rect x="8" y="14" width="4" height="4" fill="#f4f6f8" />
+  <rect x="14" y="14" width="4" height="4" fill="#f4f6f8" />
+  <rect x="20" y="14" width="4" height="4" fill="#4f7cff" />
+
+  <rect x="14" y="23" width="4" height="3" fill="#4f7cff" />
+  <rect x="9" y="26" width="14" height="2" fill="#4f7cff" />
+</svg>