Mark controller and host as optional peers of exp_server_list

Same as the other plugins get in the optional peer dependencies change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

exp_server_list/package.json

@@ -20,6 +20,14 @@
 		"@clusterio/host": "workspace:^",
 		"@clusterio/lib": "workspace:^"
 	},
+	"peerDependenciesMeta": {
+		"@clusterio/controller": {
+			"optional": true
+		},
+		"@clusterio/host": {
+			"optional": true
+		}
+	},
 	"devDependencies": {
 		"@clusterio/controller": "workspace:^",
 		"@clusterio/host": "workspace:^",