Configurable Cody History, Chat, ...

[Guilherme Rosado]

Relates to #178.

E.g I would like for CodyHistory to fill 50% of the width of the screen and center it horizontally and vertically.

It would be cool to define default layouts on the

-- this API might not be the best, but just to share the idea.
require("sg").setup({
 layouts = {
   chat = { ... }
   task = { ... }
 }
})