enable module support

Docs are currently all at the same level regardless of module.

Find a way to denote the module when documenting a function / variable / syntax.

Maybe: (doc-fun name docstring module)

Users could still say

(show-params "some-function")

when searching but the system searches through all modules looking for something with that name. We'd need to support multiple responses and give the user a list to choose from. E.G.:

(show-params "some-function")
; some-function found in 2 modules:
; 1) foo-module
; 2) bar-module
; enter the number of the item you wish to see the docs for.

Alternately the user could specify the module directly

(show-params "some-function" "foo-module")

Start by locating the implementations and tests for doc-fun and show-params, the entry points named in the issue. Determine how documented functions, variables, and syntax are stored and looked up, then define module association, direct module selection, and the multiple-match response. Done means documentation can distinguish identical names across modules while preserving name-only searches.