ci: add fuzzing workflow

This will run all fuzzing tests for 15 minutes once a day.

Tools/ci/run_fuzz_tests.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+# This script runs the fuzz tests from a given binary for a certain amount of time
+set -e
+
+if [[ "$1" == "--help" || "$1" == "-h" || -z "$1" ]]; then
+  echo "Usage: $0 <binary> [<duration>]"
+  echo "duration can be for example 5m or 5h"
+  exit 0
+fi
+
+binary="$1"
+duration="$2"
+[[ -z "$duration" ]] && duration="1m"
+
+# Iterate over all available fuzz tests in the binary
+for t in $("$binary" --fuzz=__non_existent__ 2>&1 | sed '1,/^Valid tests:$/d' | tr -d ' '); do
+  echo "Running $t"
+  "$binary" --fuzz="$t" --fuzz_for="$duration"
+done