Document Snaps cron jobs feature

[alexandratran]

Description

Add feature page for Snaps cron jobs. Consolidate and clarify some information from the corresponding permission and entry point descriptions. Also reorder Snaps feature pages in alphabetical order.

Issue(s) fixed

Fixes #1263

Preview

https://docs.metamask.io/1263-cronjobs/snaps/features/cron-jobs/

Checklist

Complete this checklist before merging your PR:

• [x] If this PR contains a major change to the documentation content, I have added an entry to the top of the "What's new?" page.
• [ ] The proposed changes have been reviewed and approved by a member of the documentation team.

[github-actions[bot]]

Preview published: 1263-cronjobs

[github-actions[bot]]

Preview published: 1263-cronjobs

[github-actions[bot]]

Preview published: 1263-cronjobs