[CHECKLIST] Docs updates

[drewstone]

• Remove learn (don't need Webb bridges in Tangle)
• Check all links, add something to CI
• Add substrate to EVM conversion
• Remove DKG-Substrate
• Spin DKG stats sites down
• BABE updates
• Update validator docs on tangle.docs tangle#378
• Make Tangle dropdown overview active state the default

[thomivy]

Current status

• Remove learn (don't need Webb bridges in Tangle)
• Check all links, add something to CI
• Add substrate to EVM conversion
• Remove DKG-Substrate from Pallets list
• Spin DKG stats sites down
• BABE updates
• Update validator docs on tangle.docs tangle#378
• Make Tangle dropdown overview active state the default

[drewstone]

@thomivy also need to update favicon. The examples below are both from tangle docs.

[thomivy]

Remaining:

• Spin DKG stats sites down

[monaiuu]

@thomivy Can we add a section on the doc site on how restaking works? Hoping to link to doc site via below container/button on the service dashboard UI:

[monaiuu]

Also search engine result for tangle docs is displaying old favicon:

[monaiuu]

Add tangle twitter to this community channels:

https://docs.tangle.tools/docs/community/#community-channels