docs: make rollup stack menu more clear

[jcstein]

something like this:

Rollup Stacks

• Overview

  • Introduction to rollups on Celestia
  • Choosing your rollup stack

• Using Celestia as DA Layer

  • EVM Rollups
    • Arbitrum
    • Optimism
    • Ethereum Fallback Mechanism
  • Deployed rollups
    • Eclipse (SVM)
    • Movement (MoveVM)

• Building on Celestia

  • Sovereign Rollups
    • Rollkit
    • Sovereign SDK
    • Astria

• Cross-Chain Infrastructure

  • Blobstream
  • Blobstream X
  • SP1 Blobstream

[Ferret-san]

• I would move Astria into a different subcategory, or its own
• Dymension wouldn't be under the settled rollups here imo since its is own thing that does not settle to Celestia

[jcstein]

what category would astria fit under? ASS layers? lol

[Ferret-san]

what category would astria fit under? ASS layers? lol

Astria should be under sovereign rollups for now and once they offer settled rollups as well we can add them there or rethink this separation