Add root CHANGELOG.md for guidance

[benjie]

Description

I wanted to know what caused the semver major changes in @envelop/core so I looked through the root folder for changelog/release notes; looked at the releases tab on the side (which wasn't particularly helpful) and searched the website, but to no avail. Just as I was about to give up, a thought struck me: "it's a monorepo!", and sure enough, changelogs are available for each package.

This file will hopefully help other people that also didn't think to look in folders.

Type of change

New repo documentation file.

Checklist:

• I have followed the
  CONTRIBUTING doc and the
  style guidelines of this project
• I have performed a self-review of my own code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Further comments

At least I figured this out before DM-ing you! ❤️

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9ef2743

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[EmrysMyrddin]

By the way, I don't know what happened to the documentation, but the migration guide from v3 to v4 is actually the migration guide from v4 to v5...

[EmrysMyrddin]

Can you run prettier ? Otherwise LGTM :-)

[EmrysMyrddin]

Perhaps we could even make a symlink to the core plugin ?