chore: extract userbot subtree to its own repo

userbot/ (bot plus panel) now lives at /home/forust/userbot as a clone of forust/userbot instead of a subtree in homelab. Cleans up the pipeline references that only existed for it: scan-deps, test-backend and test-frontend jobs, the userbot build matrix entries, the deploy panel hook, and the userbot-only pyrightconfig. Running cluster workloads are untouched; homelab just stops building and testing upstream's code.

.gitea/workflows/deploy-lib.sh

@@ -779,19 +779,6 @@ stage_apply_k8s() {
       exit 1
     fi
   done
-  if [ -f "$REPO/userbot/k8s/active" ]; then
-    log "userbot panel hook"
-    if kubectl get secret userbot-common-secrets -n userbot >/dev/null 2>&1; then
-      echo "  userbot-common-secrets already present in userbot ns, not touching"
-    elif kubectl get secret userbot-common-secrets -n default >/dev/null 2>&1; then
-      echo "  bootstrapping userbot-common-secrets into userbot ns"
-      kubectl get secret userbot-common-secrets -n default -o json \
-        | jq 'del(.metadata.annotations,.metadata.creationTimestamp,.metadata.resourceVersion,.metadata.uid,.metadata.managedFields) | .metadata.namespace = "userbot"' \
-        | kubectl apply -f -
-    else
-      echo "  WARNING: userbot-common-secrets missing in both default and userbot ns; create it manually from the laptop"
-    fi
-  fi
   restart_stale_images
 
   # No verification here on purpose. This stage may be killed at any point by