docs: add ILP link to peer typescript descriptions

[melissahenderson]

Previously, the descriptions for the incomingAuthTokens and outgoingAuthToken parameters in the files below linked to a specific page within the Rafiki user docs.

• /packages/frontend/app/routes/peers.$peerId.tsx
• /packages/frontend/app/routes/peers.create.ts

The revised version of the Rafiki docs no longer contain the information these files linked to because the information was specific to Interledger, not Rafiki. The links were removed before publishing, so now the descriptions are simple text.

We need to find the best place to re-link to. Ideally, it will be somewhere within the Interledger developer docs/specs since the linked phrase was ILP packets. Other parameters in the files link to the Interledger specs, so it's OK to continue to do so.

• incomingAuthTokens - List of valid tokens to accept when receiving incoming [ILP packets] from the peer.
• outgoingAuthToken - Valid auth token to present when sending outgoing [ILP packets] to the peer.