Inject-aware context documentation changes

[niksy]

I’ve noticed some parts in documentation regarding SSR that I think could benefit from changes to make them more understandable:

• In part on using outside setup(), there is example where it says you need to pass Pinia instance to useStore call inside vue-router guard, but that is not necessary as of vue-router 4.2 since guards are inject-aware and proper Pinia instance would be injected. Is that correct? Should that be changed to use some other example?
• In part on using outside components, it says "When dealing with Server Side Rendering, you will have to pass the pinia instance to useStore()." I think passing instance is not necessary if you call useStore inside app.runWithContext, is that true? Can this section be expanded to include example of that approach?

I’m willing to submit changes to documentation if you think these statements are correct.

[posva]

1. Yes, it should be updated with a tip that explains this is no longer necessary
2. I'm not sure if app.runWithContext() is intended for app-level usage. I added it for libraries to benefit from the injection context. I think that section of the docs and the linked ssr page is fine

[niksy]

I'm not sure if app.runWithContext() is intended for app-level usage. I added it for libraries to benefit from the injection context. I think that section of the docs and the linked ssr page is fine

But is it correct that it can be used for app-level needs to avoid passing Pinia instance and instead get it from app injection context, even in SSR applications? There is no mention in official documentation regarding intended usage.