Add durability policy, userutils branding patch for Red Bear OS login/issue

Enforce that every source-tree edit must be mirrored to local/patches/
and wired into recipe.toml in the same session. Apply the policy
retroactively to userutils res/issue and res/motd (Redox → Red Bear).

recipes/core/userutils/recipe.toml

@@ -1,5 +1,8 @@
 [source]
 git = "https://gitlab.redox-os.org/redox-os/userutils.git"
+patches = [
+    "../../../local/patches/userutils/redox.patch",
+]
 
 [build]
 template = "custom"