feat(presets): add PatewayAI provider presets

Add PatewayAI as a new partner provider with support for:
- Claude Code preset (using ANTHROPIC_API_KEY field)
- Codex preset (gpt-5.5 model)
- Claude Desktop preset (proxy mode with passthrough routes)
- Icon configuration (pateway.jpg)
- i18n support (zh/en/ja) with $3 registration bonus promotion

PatewayAI provides reliable API routing services for Claude Code,
Codex, and Gemini models.

src/icons/extracted/metadata.ts

@@ -282,6 +282,12 @@ export const iconMetadata: Record<string, IconMetadata> = {
     keywords: ["packycode", "packy", "packyapi"],
     defaultColor: "currentColor",
   },
+  pateway: {
+    name: "pateway",
+    displayName: "PatewayAI",
+    category: "ai-provider",
+    keywords: ["pateway", "patewayai", "claude", "codex"],
+  },
   palm: {
     name: "palm",
     displayName: "palm",