feat: add tentative "CC slowness fix" feature

This is an urgent addition to help fix a CC issue.

Related to
https://groups.google.com/g/twpowertools-discuss/c/RUr7249IBuQ.

Change-Id: I3d40b70fb71b31f0b47c5f04ee20f440e49f2029
diff --git a/src/static/_locales/en/messages.json b/src/static/_locales/en/messages.json
index 27f893a..0270096 100644
--- a/src/static/_locales/en/messages.json
+++ b/src/static/_locales/en/messages.json
@@ -183,6 +183,10 @@
     "message": "Show a toggle to enable/disable nested view in threads.",
     "description": "Feature checkbox in the options page"
   },
+  "options_fixpekb269560789": {
+    "message": "Tentative fix for CC slowness and high memory usage (<a href='https://s.iavm.xyz/cc-running-slow-pekb'><code>pekb/269560789</code></a>).",
+    "description": "Feature checkbox in the options page"
+  },
   "options_save": {
     "message": "Save",
     "description": "Button in the options page to save the settings"