Chore: Remove dev branch

[Hugos68]

This PR prepares for the removal of the dev branch as it serves no purpose. Changesets are already kept on a seperate branch until release and we're only fighting against it by having a seperate branch.

What this PR does:

• Change baseBranch from "dev" to "main" in .changeset/config.json
• Remove Merge main into dev after publish step from .github/workflows/release.yml
• Remove "PR targets the dev branch (NEVER main branch)" from .github/pull_request_template.md

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Name	Status	Preview	Comments	Updated (UTC)
floating-ui-svelte	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 16, 2024 10:28pm

[changeset-bot]

⚠️ No Changeset found

Latest commit: f7d140f

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.

This PR includes no changesets

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Click here to learn what changesets are, and how to add one.

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[AdrianGonz97]

This LGTM! I took the liberty of simplifying the CI a bit more by using the packageManager field (pnpm/action-setup is able to install the correct version based on this field) as well as updated the contribution docs.

The last thing to do is to also change the default branch of this repo to main and we should be good to go!

[endigo9740]

Thanks @AdrianGonz97

@Hugos68 let's coordinate on this tomorrow afternoon my time.