Add deprecation notices to all packages

[jesstelford]

No description provided.

[shopify-shipitnext]

🔎 View this PR in Shipit Next.

ℹ️ Expand to learn how to deploy and handle emergencies using Shipit Next

Overview

Shipit Next will merge your code on your behalf because this repository uses Shipit Next and its merge queue.

To ship this PR, you can either:

• Comment /shipit to enqueue this PR for merging.
• Go to this PR in Shipit Next and click on the "Ship It" button in the top-right corner.

Comment Commands

• /shipit: Enqueue this PR into the merge queue where it will eventually be merged and deployed.
• /cancel: Eject this PR from the merge queue and rebuild PRs that were enqueued after this PR.
• /shipit --jump-queue: Enqueue this PR at the top of the merge queue where it will be included in the next deploy. Use this for non-emergency situations.
  - Emergency handling procedure for this command can be found here.
• /shipit --emergency: Merge this PR directly into main and deploy to all environments once all require_for_emergency CI checks pass. Please be aware that changes deployed with this command will not be automatically rolled back.
  • Emergency handling procedure for this command can be found here.

Commands exclusive to Deploy Before Merge

• /cancel --emergency: Eject this PR from the merge and rollback any deployments containing this PR.

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Documentation

• ℹ️ You can read how the merge queue works in Vault here.
• ⚠️ Emergency handling documentation in the Vault describes how to handle emergencies, e.g. failed canaries, broken code in production, etc.

Questions or feedback?

• Non-urgent questions can be submitted in our Discourse.
• Feedback can be submitted in our frustrations Google form.
• If you have feature requests, you may add them or vote for them in our GitHub repository.