Add alternative networks (part 1/2)

[jonaharagon]

Changes proposed in this PR:

• Add I2P
• https://discuss.privacyguides.net/t/alternative-self-contained-networks/17792

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[privacyguides-bot]

This pull request has been mentioned on Privacy Guides. There might be relevant details there:

https://discuss.privacyguides.net/t/alternative-self-contained-networks/17792/1

[github-actions[bot]]

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[jonaharagon]

Actually this will be part 1, and I'll do part 2 (private networks like tailscale + public networks like ipfs) in a future PR. So this is ready to go.

[dngray]

:+1: LGTM.

[privacyguides-bot]

This pull request has been mentioned on Privacy Guides. There might be relevant details there:

https://discuss.privacyguides.net/t/2024-04-10/17801/1