add global settings context

will be useful going forward, and simplify widget props being passed around all over the place

src/utils/settings-context.jsx

@@ -0,0 +1,15 @@
+import { createContext, useState, useMemo } from "react";
+
+export const SettingsContext = createContext();
+
+export function SettingsProvider({ initialSettings, children }) {
+  const [settings, setSettings] = useState({});
+
+  if (initialSettings) {
+    setSettings(initialSettings);
+  }
+
+  const value = useMemo(() => ({ settings, setSettings }), [settings]);
+
+  return <SettingsContext.Provider value={value}>{children}</SettingsContext.Provider>;
+}