Update from code changes: Personal pages can't move to Teamspace

[mintlify]

The editor no longer lets you move Personal pages into Teamspace (by drag and drop or the Move to picker), so this removes those instructions and the "move a private page first" tip, and updates the one-way move warning, in all four languages.
Source: editor change merged 2026-10-04 removing Personal → Teamspace moves.

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Note

Low Risk
Documentation-only updates across four locale files; no product or runtime behavior changes in this PR.

Overview
Updates Create and edit pages docs (EN, ES, FR, ZH) to match the editor change that disallows moving pages between Personal and Teamspace (drag-and-drop and Move to).

The Teamspace section no longer tells users to move a private page first to reveal the section, and drops the paragraph on dragging or using Move to from Personal into Teamspace. The Move a page to your site warning now states explicitly that Personal and Teamspace cannot exchange pages, while Move to site remains one-way and Site cannot return to Workspace.

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