Move all config definitions to their respective modules

Modules/Noter.lua

@@ -2,6 +2,12 @@ local _, shared = ...
 ---@cast shared HeimdallShared
 local ModuleName = "Noter"
 
+---@class HeimdallNoterConfig
+---@field enabled boolean
+---@field debug boolean
+---@field channels string[]
+---@field lastNotes number
+
 ---@class Note
 ---@field source string
 ---@field for string