Improve IPNS docs

[2color]

Context

This is a significant rewrite of the IPNS docs addressing many of the repeated questions while providing an overview of the tradeoffs.

#1236

TODO

• move Example IPNS Setup with CLI section to a separate how-to in https://docs.ipfs.tech/how-to/publish-to-ipns-from-cli/

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[mishmosh]

Very nice. If there are any case studies or project codebases that nicely illustrate the tradeoffs you cover in the second half of this article, it might be nice to list examples.

Approving since my comments and suggestions are all non-blocking.

[filecorgi]

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