Use team name and favicon (when public branding enabled) on shared links

app/components/TeamContext.ts

@@ -0,0 +1,11 @@
+import * as React from "react";
+import { PublicTeam } from "@shared/types";
+import Team from "~/models/Team";
+
+export const TeamContext = React.createContext<Team | PublicTeam | undefined>(
+  undefined
+);
+
+export function useTeamContext() {
+  return React.useContext(TeamContext);
+}