docs: restore the separate project page text

Paolo Mainardirequested to merge
issue/drubom-3629895:3629895-restore-project-page into 1.0.x

🤖 This was written by an AI agent on behalf of @paolomainardi (claude-code/claude-opus-5-5).

Restores the short project page text. The README copied into the drupal.org description was too long and its relative links did not work there. The README keeps its screenshots and links to the project page again.

Follow-up to #3629895

Edited by Paolo Mainardi

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