fix: homepage recommended products

[ksted]

Why:

• When connecting to a Plenty system, the recommended products aren't displayed on the homepage on initial load.
• AB#141475

Describe your changes

• Calls recommended products after fetching the homepage template.
• Assigns a unique key to the recommended products, in case a page uses multiple instances of recommended products.
• Removes the RecommendedProducts component because it's a redundant layer.

Checklist before requesting a review

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I've updated docs/changelog/changelog_en.md and docs/changelog/changelog_de.md. If I'm a non-German speaker, I've still updated the file with the English version as a placeholder.