Flesh out a sharable DWN protocol standard

[shamilovtim]

DWN protocols currently aren't required to specify their types or shape which means our goal of facilitating their sharing is not being met.

Ideas we have:

1. Typescript types should be shipped
2. JSON Schema should be shipped
3. Protocols could maybe ship as an npm package? credit: @mistermoe
4. Maybe JSDocs should be required?

Follow up thoughts:

How do we lint a future protocol and ensure that our standards are being met? For example, if we say that they should ship types how do we lint and accept/reject such a protocol?

• Ideas: console.warn nagging if something is missing.
• CLI nagging if something is missing.
• Exclusion from searchable master protocols DB website if something is missing

[shamilovtim]

Idea: we model after https://github.com/DefinitelyTyped/DefinitelyTyped and claim an npm scope like @web5-protocols. Then we allow pull requests to a Github repo web5-protocols and similar to DefinitelyTyped, each package gets published to npm under @web5-protocols/name-of-package.