We have an existing MPT tutorial and a separate code sample for MPT metadata. We should update the tutorials, and revise them for simplicity (e.g. not using the "MPT Generator" sample code).

Some other notes:

• The existing tutorial takes half-measures with mentioning signer details and then not explaining how to add them. The tutorial should probably link out to a separate tutorial on setting up multi-signing as a "see also" / "read more" / "next steps" kind of thing, but not bring it up in the midst of the flow.
• The tutorial mentions the account's TransferRate, which only applies to v1 tokens (IOUs), not MPTs. Similarly for TickSize—MPTs currently don't even support the DEX and I'm not currently sure if they'll respect the issuer's Tick Size setting when they do, or if they'll have their own configurable TickSize property per issuance.
• Token metadata should follow the XLS-89 standard as described in the code sample