CrashReporter: fix deadlocks by making it mostly async-signal-safe (#5771)

`CrashReporter::createAndSaveCrash()` is not async-signal-safe,
resulting in random deadlocks/double-crashes during Hyprland crashes.
This changes the function to be (mostly) async-signal-safe.

src/plugins/PluginSystem.cpp

@@ -194,3 +194,13 @@ std::vector<CPlugin*> CPluginSystem::getAllPlugins() {
         results[i] = m_vLoadedPlugins[i].get();
     return results;
 }
+
+size_t CPluginSystem::pluginCount() {
+    return m_vLoadedPlugins.size();
+}
+
+void CPluginSystem::sig_getPlugins(CPlugin** data, size_t len) {
+    for (size_t i = 0; i < std::min(m_vLoadedPlugins.size(), len); i++) {
+        data[i] = m_vLoadedPlugins[i].get();
+    }
+}