feat(createInjectionState): add defaultValue option

[melishev]

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Description

When using inject from vue, we can pass it a second argument defaultValue, which will help avoid problems and most importantly an error in the console that the provide context was not detected. I propose to extend createInjectionState to support this functionality

Additional context

Perhaps we should provide the ability to pass defaultValue not only when declaring a hook, but also when using useInjectedState.

[dvelikiy]

This is useful pls approve

[yakovlevgleb]

I need this!!!!

[cherkatya96]

Please, approve it!! I need it too!! 🤩

[mobdiz]

This is a necessary feature for me 👍🏼

[melishev]

@Alfred-Skyblue can u check pls again?

[melishev]

@antfu bro, can you upload this PR, I'm getting tired of seeing warning in my console

[gevvos]

Hi, could someone please tell me when this PR will be merged? I need it for my project.