chore: refactor release workflow

[nedsalk]

• Closes Decouple release workflow #3667

Summary

This PR splits the release workflow into three workflows:

• changesets-pr.yaml, which creates/updates the changesets PR,
• release.yaml, which publishes releases when the changesets PR is merged,
• publish-to-next.yaml, which publishes to the next in our GitHub npm registry on every merge to master

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
fuels-template	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 14, 2025 9:05am
ts-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 14, 2025 9:05am
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[github-actions]

Coverage Report:

Lines	Branches	Functions	Statements
77.2%(+0.05%)	70.88%(+0.19%)	75.31%(+0.01%)	77.19%(+0.04%)

Changed Files:

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	packages/account/src/providers/provider.ts	67.53% (+0.58%)	59.8% (+2.73%)	68.04% (+0%)	67.29% (+0.56%)
🔴	packages/errors/src/test-utils/expect-to-throw-fuel-error.ts	91.66% (-0.34%)	88.88% (+0%)	100% (+0%)	91.66% (-0.34%)