fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/hooks/common/use-effect-with-catch.ts

@@ -0,0 +1,30 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { DependencyList, EffectCallback } from 'react'
+import { useEffect, useState } from 'react'
+
+/**
+ * Executes a side effects but catches any thrown error.
+ *
+ * @param effect The side effect to execute
+ * @param deps The dependencies of the effect
+ * @return The produced error (if occurred)
+ */
+export const useEffectWithCatch = (effect: EffectCallback, deps: DependencyList = []): Error | undefined => {
+  const [error, setError] = useState<Error | undefined>(undefined)
+
+  useEffect(() => {
+    try {
+      return effect()
+    } catch (error) {
+      setError(error as Error)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, deps)
+
+  return error
+}