feat(useFetch): support sending the custom request to an absolute URL regardless baseURL

[sun0day]

Description

useFetch now supports sending the custom request to an absolute URL regardless baseURL

const useMyFetch = createFetch({ baseUrl: 'https://example.com', fetchOptions: {...}})

useMyFetch('test') // request https://example.com/test

// Before PR:
useMyFetch('https://a.com/test') // request https://example.com/https://a.com/test

// After PR:
useMyFetch('https://a.com/test') // request https://a.com/test

Additional context

The test suite for this feature is covered and passed

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[sxzz]

/cc @antfu

[wheatjs]

Seems reasonable to me, maybe mention it in the documentation somewhere?

[sun0day]

Seems reasonable to me, maybe mention it in the documentation somewhere?

It has mentioned in Type Declarations. @wheatjs @sxzz