feat(presets): add NekoCode partner preset for 6 apps

Partner aggregator (New API gateway) across Claude Code, Claude Desktop,
Codex, OpenCode, OpenClaw, and Hermes -- no Gemini, since its /v1beta
surface falls through to the web app. Claude Code and Claude Desktop use
the bare host https://nekocode.ai; Codex, OpenCode, OpenClaw, and Hermes
use /v1 with gpt-5.5.

Marks isPartner with the ?aff=CCSWITCH referral on apiKeyUrl only (the
website URL and every API endpoint stay bare, so the attribution param
never rides on a real request). Adds the partnerPromotion blurb in all
four locales and a sponsor row appended to the end of all four READMEs,
surfacing the CC Switch offer: 10% off top-ups with promo code cc-switch.
Registers the logo-derived nekocode-icon.png via URL import; the README
banner is normalized to the standard 1920x798 aspect ratio.

src/config/codexProviderPresets.ts

@@ -376,6 +376,22 @@ export const codexProviderPresets: CodexProviderPreset[] = [
     partnerPromotionKey: "code0",
     icon: "code0",
   },
+  {
+    name: "NekoCode",
+    websiteUrl: "https://nekocode.ai",
+    apiKeyUrl: "https://nekocode.ai?aff=CCSWITCH",
+    category: "aggregator",
+    auth: generateThirdPartyAuth(""),
+    config: generateThirdPartyConfig(
+      "nekocode",
+      "https://nekocode.ai/v1",
+      "gpt-5.5",
+    ),
+    endpointCandidates: ["https://nekocode.ai/v1"],
+    isPartner: true,
+    partnerPromotionKey: "nekocode",
+    icon: "nekocode",
+  },
   {
     name: "Azure OpenAI",
     websiteUrl: