Add examples to our playground

[NetanelBasal]

Which @ngneat/query-* package(s) are relevant/releated to the feature request?

No response

Description

Take one or more of the following examples, create an issue, and assign it to yourself:

• Default Query Function (https://tanstack.com/query/v4/docs/examples/react/default-query-function) Default Query Function example #31
• Prefetching (https://tanstack.com/query/v4/docs/examples/react/prefetching)
• Star Wars (https://tanstack.com/query/v4/docs/examples/react/star-wars) Star Wars Example #37
• Rick Morty (https://tanstack.com/query/v4/docs/examples/react/rick-morty) Rick Morty example #38
• Playground (https://tanstack.com/query/v4/docs/examples/react/playground) Implement playground example in our playground app #43
• Optimistic Updates (https://tanstack.com/query/v4/docs/examples/react/optimistic-updates-typescript) Optimistic exemple playground #44
• Auto Refetching (https://tanstack.com/query/v4/docs/examples/react/auto-refetching)
• Placeholder data (https://tanstack.com/query/v4/docs/guides/placeholder-query-data)
• Initial data (https://tanstack.com/query/v4/docs/guides/initial-query-data)
• Table with server side filters and sorting

Proposed solution

Alternatives considered

Do you want to create a pull request?

No

[ronnyek]

I see optimistic updates as being checked here... is this documentation I should be able to see somewhere? Is this functionality already implemented in the library?