General Cleanup and Janitor Action

[Yukari Hafner]

There are a lot of dirty and gross parts in radiance-web and radiance-core that are both hard to understand and probably just waiting to bug out. A general cleanup is direly needed.

• Things in radiance-web/toolkit and radiance-core/toolkit seem to be in one or the other without much rhyme or reason.
  See next
• Generally the differentiation between -core and -web does not seem to be outlined well-enough. Either find a proper separation of concerns or merge the two together.
  The two have been merged.
• api-output is complicated and not clearly defined in what exactly it is supposed to do. Rethink and rewrite.
  I apparently did this at some point, or at least I can't see anything wrong with it at this point.
• api-serialize is completely broken as it is now. The mechanisms for defining what kind of objects are serialized how need to be lexically overridable so that outputs can remove/redefine things as they seem fit and only use the defaults when appropriate. Some kind of mergeable-lookup table for hooking the types to the serializing functions is needed.
  Solved.
• api-call and make-api-call are almost identical. Find some way to merge them / reduce duplication.
  Calling convention rewritten.
• Reconsider the error handling in the api-page. Probably all errors should be serialized, but responses should carry the correct return-code.
  No, it might always happen that a generic error page is presented for some other reason, so any and all non-api related errors should result in a page.
• handle-condition needs to be rewritten to only call the debugger if one is available and *debugger* is non-NIL. It should also offer a restart to simply relay the error.
  Available present-error-page restart during debugging.
• Reconsider the role of redirect. Maybe it should act as a return-like construct.
  No, that would require it to be a macro and would end up being more surprising than the alternative.
• Currently the error catching and handling in request is awful and hard to understand. Rewrite that part completely.
  request has been rewritten.

There's probably a lot more still.