Enable coding-agent bundled skill

- allow coding-agent in bundled skill allowlist for prod + example config
- unblocks coding-agent skill visibility on hosts

Tests: not run (config only)

nix/examples/clawdinator-host.nix

@@ -45,7 +45,7 @@
           identity.name = "CLAWDINATOR-1";
         }
       ];
-      skills.allowBundled = [ "github" "clawdhub" ];
+      skills.allowBundled = [ "github" "clawdhub" "coding-agent" ];
       channels = {
         discord = {
           enabled = true;

nix/hosts/clawdinator-1-common.nix

@@ -132,7 +132,7 @@ in
           slots.memory = "none";
           entries.discord.enabled = true;
         };
-        skills.allowBundled = [ "github" "clawdhub" ];
+        skills.allowBundled = [ "github" "clawdhub" "coding-agent" ];
         cron = {
           enabled = true;
           store = "/var/lib/clawd/cron-jobs.json";