chore(sponsors): drop AICoding partner from README, presets and i18n

Remove AICoding (aicoding.sh) sponsor entry from the three README files
and the provider preset across all seven app_types (claude, codex,
gemini, hermes, opencode, openclaw, claudeDesktop). Also drop the
matching partner_promotion.aicoding string in zh/en/ja locales.

The icon (src/icons/extracted/index.ts) and the legacy provider id in
codex_history_migration.rs are kept intentionally: the former for
possible later re-use, the latter so existing users' Codex history
still gets bucketed into "custom" on upgrade.

src/config/hermesProviderPresets.ts

@@ -902,30 +902,6 @@ export const hermesProviderPresets: HermesProviderPreset[] = [
       model: { default: "claude-opus-4-7", provider: "aicodemirror" },
     },
   },
-  {
-    name: "AICoding",
-    websiteUrl: "https://aicoding.sh",
-    apiKeyUrl: "https://aicoding.sh/i/CCSWITCH",
-    settingsConfig: {
-      name: "aicoding",
-      base_url: "https://api.aicoding.sh",
-      api_key: "",
-      api_mode: "anthropic_messages",
-      models: [
-        { id: "claude-opus-4-7", name: "Claude Opus 4.7" },
-        { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
-        { id: "claude-haiku-4-5-20251001", name: "Claude Haiku 4.5" },
-      ],
-    },
-    category: "third_party",
-    isPartner: true,
-    partnerPromotionKey: "aicoding",
-    icon: "aicoding",
-    iconColor: "#000000",
-    suggestedDefaults: {
-      model: { default: "claude-opus-4-7", provider: "aicoding" },
-    },
-  },
   {
     name: "CrazyRouter",
     websiteUrl: "https://www.crazyrouter.com",