Translate configure-automerge guide to es/fr/zh

[mintlify]

Summary

• Added Spanish, French, and Chinese translations for the new guides/configure-automerge.mdx page
• Updated guides/index.mdx in all three languages to include the new automerge guide link
• Updated docs.json navigation to add the new page in all language sections

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Note

Low Risk
Low risk documentation-only change that adds localized content and navigation links; no runtime code paths are affected beyond potential broken/incorrect doc routing.

Overview
Adds new configure-automerge guide pages in Spanish, French, and Chinese describing how to add the Mintlify GitHub App to a ruleset bypass list to allow workflow-driven automerge.

Updates the Guides indexes and docs.json navigation for fr, es, and zh to surface the new guide link under the AI section.

^{Written by Cursor Bugbot for commit 6c8ba2a. This will update automatically on new commits. Configure here.}