RFC: Transform "Common Questions" to a "Recipes" page in the docs

[kitten]

Summary

The current "Common Questions" page in the docs is a little low on content, but we do have content that needs to be written up. What they all have in common is that they're frequently "exchange patterns" and code snippets that we have that a user would pick up and customise for things that are very custom.

Proposed Solution

We can rename "Common Questions" to "Recipes" and port some content over.

• Authentication is a common recipe: https://gist.github.com/kitten/6050e4f447cb29724546dd2e0e68b470
• Global Error handling is a common recipe: https://spectrum.chat/urql/help/two-initial-questions-on-apollo-urql-port~2ceb551e-28b9-4b26-8810-90aeb3b3559a?m=MTU4OTQ1ODkzMDcwMQ==

Furthermore, it'd be great to 1) keep the titles on that page shorter to make it more searchable, and 2) to maybe add summary+details spoilers if it becomes too long (?)

Requirements

• Rename "Common Questions" to "Recipes"
• Ensure that the recipe is not too specific (it should be highlighted that the code is a pattern, but will only vaguely reflect what the user must do, e.g. "Insert your X logic here/there") but must be descriptive enough to allow initial copy&pasting
• Add "Authentication" recipe
• Add "Global Error Handling" recipe

[kitten]

I think we sufficiently cover this now and don't need new sections in the docs momentarily