chore(presets): switch RelaxyCode icon to custom relaxcode.png

Replace the generic claude icon with a dedicated relaxcode.png icon
for the RelaxyCode provider presets.

src/icons/extracted/metadata.ts

@@ -397,6 +397,12 @@ export const iconMetadata: Record<string, IconMetadata> = {
     category: "ai-provider",
     keywords: ["runapi", "run", "aggregator", "gateway"],
   },
+  relaxcode: {
+    name: "relaxcode",
+    displayName: "RelaxyCode",
+    category: "ai-provider",
+    keywords: ["relaxycode", "relaxcode", "relax"],
+  },
   eflowcode: {
     name: "eflowcode",
     displayName: "E-FlowCode",