Add service orchestration and web UI

internal/service/templates/static/footer/toolbar.gohtml

@@ -0,0 +1,31 @@
+{{ define "footer/toolbar" }}
+  <div class="footer__toolbar">
+    <button
+      type="button"
+      class="footer__toolbar-btn"
+      id="reset"
+      aria-label="Reset conversation"
+    >
+      <svg class="icon"><use href="/static/icons.svg#reset"></use></svg>
+    </button>
+    <div class="footer__toolbar-spacer"></div>
+    <select id="model" class="footer__select" aria-label="Model">
+      <option value="" disabled selected>
+        Loading...
+      </option>
+    </select>
+    <select id="voice" class="footer__select" aria-label="Voice">
+      <option value="" disabled selected>
+        Loading...
+      </option>
+    </select>
+    <button
+      type="button"
+      class="footer__toolbar-btn"
+      id="mute"
+      aria-label="Mute"
+    >
+      <svg class="icon"><use href="/static/icons.svg#volume"></use></svg>
+    </button>
+  </div>
+{{ end }}