Add initial JSON data files and implement core page components for game functionality

app/ViewModel/useTeamViewModel.js

@@ -0,0 +1,33 @@
+import { useEffect, useState } from 'react';
+import { getTeam } from '../API/API';
+import { getSession } from '../Model/SessionStore';
+
+const useTeamViewModel = (teamId = null) => {
+  const [team, setTeam] = useState(null);
+  const resolvedTeamId = teamId ?? getSession().currentTGid;
+
+  useEffect(() => {
+    if (!resolvedTeamId) {
+      setTeam(null);
+      return;
+    }
+    let active = true;
+    getTeam(resolvedTeamId).then((payload) => {
+      if (active) {
+        setTeam(payload);
+      }
+    }).catch(() => {
+      if (active) {
+        setTeam(null);
+      }
+    });
+    return () => {
+      active = false;
+    };
+  }, [resolvedTeamId]);
+
+  return { team };
+};
+
+export default useTeamViewModel;
+