Design for human IDs and aliases

[jldec]

MESDK-59

OG issue & discussion: opral/monorepo#1892

The current experimental implementation of aliases is incomplete
Only the default alias is supported for plugin message IDs, and uniqueness is assumed.

Next steps

• New message creation with auto-generated human id (no alias)
• Improve Sherlock and Fink messages UI (e.g. "@" for aliases feels rough)
• Improve tooling to connect messages wtih context / code
• (?) additional alias types e.g. for mobile frameworks

Additional TODOs migrated from opral/monorepo#2346

• review docs
• how to handle (or disallow) alias non-uniqueness
• how to handle (or disallow) alias updates
• review Fink search by alias https://github.com/opral/monorepo/pull/2108/files#r1510753012