feat: expose GlobalOptions type

[pi0]

🔗 Linked issue

Resolves #302

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR exposes SharedOptions type, a sub type of FetchOptions that is completely safe to be shared in reusable instances via global configuration. (currently timeout, retry and retryDelay) other things in the future such as respectProxy might be included.

The border between choosing if something is safe to be global option or not is that it should not affect any runtime logic behavior changes.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

/cc @danielroe This does not include retryStatusCodes like nuxt types. More thinking, it can affect runtime behavior of utils when we interpret a response code as valid invalid. Happy to consider adding it if you think would make sense and have global usecases to be configured.

[codecov]

Codecov Report

Merging #307 (c3acba4) into main (da64d78) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

❗ Current head c3acba4 differs from pull request most recent head 17f3290. Consider uploading reports for the commit 17f3290 to get more accurate results

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