Remove references to any in src/keri/core directory

[iFergal]

WebOfTrust/keria#369 and subsequent PRs we resolve a lot of the typing in the app directory, so this is a ticket to track improving the typing in the src/keri/core directory.

There may be some overlap/dependencies or cases where we can use Pick and Omit to extract parts of the generated types.

In general:

• unknown or Record<string, unknown> should be preferred over any if we truly cannot type it.
• The Dict interface should be removed in favour of Record<string, unknown> as it has only been used as Dict<any> to be similar to keripy, but isn't idiomatic to TS.
• Everything else should have a type.