Micro AI macros: make description= keys translatable
Micro AI scenarios: add wmllint unbalanced-on/off comments

These are needed because wmllint gets confused by tags inside message
texts as well as by code that looks like tags, such as the path= keys
in [modify_ai] tags.
Micro AI scenario files: remove some double spaces after sentence ends.

wmllint was complaining about those.
healer_support Micro AI: Add a 'wmllint: ignore' comment

wmllint expects the aggression= key to be used inside [ai] tags only.