[ci skip] Sunset Drone CI: remove all artifacts, DNS, configs, and references

Drone CI has been fully replaced by Woodpecker CI at ci.viktorbarzin.me.
Destroys K8s resources (12), removes DNS records, NFS exports, Uptime Kuma
monitor, dashboard entry, and all code/doc references across 18 files.

stacks/dashy/conf.yml

@@ -220,12 +220,12 @@ sections:
         statusCheck: false
         id: 0_1364_phpmyadmin
       - &ref_22
-        title: Drone CI
+        title: Woodpecker CI
         description: CI/CD Service
-        icon: si-drone
-        url: https://drone.viktorbarzin.me/
+        icon: si-woodpeckerci
+        url: https://ci.viktorbarzin.me/
         target: newtab
-        id: 1_1364_droneci
+        id: 1_1364_woodpeckerci
       - &ref_23
         title: DNS Server
         description: Technitium