Have an overview of and differentiation from other, similar projects

[surchs]

There are a lot of projects in the space for neuroinformatics, data management, metadata harmonization and standardization etc. Users will (and already do) ask: "what's the difference for Neurobagel?"

We should have a section like https://fastapi.tiangolo.com/alternatives/ where we explain

• what are our core features / goals are
• what similar projects are
• how we differentiate from/ complement with each of them
• how we have taken inspiration from them

The purpose is to be honest, informative and neighbourly, so that users understand how we fit in the bigger community and what our strengths and limitations are.

[github-actions]

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