♻️ (apis/backend/index.md): Reorganize & update list of available libraries.

[Pedrojok01]

Description

According to the suggestion in the issue #12545, I have reorganized all libraries into 3 h3 categories to make everything easier to digest. Since many libraries tend to overlap each other and offer similar services (node providers offering various APIs and vice-versa), I tried to stick to the "main" product offered. Also tried to keep each category balanced.

1. Infrastructure and Node Services
2. Development Tools
3. Blockchain Services

Open to better suggestions if any. Worst case, we can default to an alphabetical order without category.
All links have been updated when needed.

Notes:

• Figment.io/datahub seems deprecated (404 links). Updated to Figment.io
• Nodesmith is dead. Removed.
• Ethercluster is dead. Removed.

Related Issue

#12545

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[wackerow]

Great, thanks @Pedrojok01! I think this is a nice iterative step in the right direction and helps make this list a bit easier to navigate. Just left a couple small suggestions to use "sentence casing" for the headers per our style guide then this should be good

Thanks for removing the dead links/projects as well 🙏

[wackerow]

Just merged in latest from dev and cleared the conflict where a new product was added here

[wackerow]

Went ahead and just made that small update with the header casing... Thanks @Pedrojok01! Pulling in

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[wackerow]

@all-contributors please add @Pedrojok01 for maintenance

[allcontributors]

@wackerow

I've put up a pull request to add @Pedrojok01! 🎉

[Pedrojok01]

Very welcome @wackerow. Happy to contribute. And thank you and the community for the great resources! I will try to help every now and then.