[Tracking] Integration Docs

[cor]

• Solidity Asset Transfer Integration docs #3050
• instead of re-defining LocalToken, Height, and IRelay, import these interfaces from the .sol files that we define.. UPDATE: We won't do this until we've published our stack to SPM, for which we're waiting on the v2 stack
• document how to set extension to the appropriate PFM message, and how to fetch the info from the GraphQL API
• Rust Asset Transfer Integration docs #3051
• update solidity ucs01 guide #3072

After that, we'll make pages on how to open channels and send packets

• Run button for graphql samples
• Run button for typescript samples