As a user I want customer ordering from menu

[knoffi]

• [x] adding offer with asset key adds patterns for impressions
• [x] deleting/rerolling offer removes old influence on impression patterns
• [x] effects have high encapsulation from previous logic (f.e. no change to DescriptionAsset or Idea, content creators do not need to handle it)

Example:

User adds "Golden Mead" -> asset key DRINKS_mead converts to pattern MENU_mead -> pattern handler adds MENU_mead for impressions (f.e. average customer)