Added missing edition badges for events

[mnocon]

Target: master, 5.0

Marked the events available only in the higher editions with badges.

Check:

• https://github.com/ibexa/experience/blob/master/composer.json
• https://github.com/ibexa/commerce/blob/master/composer.json to verify which edition introduces given feature.

The Site events page: https://doc.ibexa.co/en/latest/api/event_reference/site_events/

was already marked with a correct badge.

[github-actions[bot]]

Preview of modified Markdown:

• docs/api/event_reference/cart_events.md
• docs/api/event_reference/order_management_events.md
• docs/api/event_reference/payment_events.md
• docs/api/event_reference/segmentation_events.md