docs: fix broken doc URL, add orphan pages to nav, backfill i18n glossaries

- Fix broken JSDoc URL /plugins/developing-plugins → /plugins/building-plugins
- Add /mcp → /cli/mcp redirect to docs.json
- Add 8 orphan pages to Mintlify nav (fireworks, inferrs, memory-wiki,
  zalouser, minimax-search, rich-output-protocol, cli/wiki, cli/infer)
- Backfill 16 core product terms as do-not-translate glossary entries
  across 12 i18n locales

src/channels/plugins/types.adapters.ts

@@ -303,7 +303,7 @@ export type ChannelGatewayContext<ResolvedAccount = unknown> = {
    *   partial stubs are not supported
    *
    * @since Plugin SDK 2026.2.19
-   * @see {@link https://docs.openclaw.ai/plugins/developing-plugins | Plugin SDK documentation}
+   * @see {@link https://docs.openclaw.ai/plugins/building-plugins | Plugin SDK documentation}
    */
   channelRuntime?: ChannelRuntimeSurface;
 };