Add productcomments summary template

[mgielecinski]

Questions	Answers
Description?	This PR provides template changes to the productcomments module for this contribution PrestaShop/productcomments#222
Type?	new feature
BC breaks?	yes
Deprecations?	no
Fixed ticket?
Sponsor company
How to test?

[tblivet]

Thanks @mgielecinski for this, it's a really nice addition to the product page 👌

I have a set of small changes, mostly theme consistency (keeping the section-title component, rem instead of px, logical properties) plus a guard so the summary degrades cleanly on older versions of the module.

Most of them are easier to read as a diff than to explain. Want me to push them to your branch, or open a PR against productcomments/add-grade-summary so you can review first?

If you'd rather handle it yourself, I'll detail everything in a review instead 👍

[mgielecinski]

Hi @tblivet
I tried to improve everything you mentioned in your previous message. If I missed something or there's still something that needs to be fixed, I'd be very grateful if you could push the corrections.
Thanks ❤️