[WIP][CR] Make 'Monsters dangerously close', etc messages more specific

This addresses #9253.
WIP because need to make sure I didn't break all the things.
CR because it would be good to get input about what the messages should say specifically (right now, just gives the name of the hostile)

Basic changes:
"Monster dangerously close!" -> "Zombie is dangerously close!"
You were hurt!" -> "You were attacked by zombie!"
"Hostiles are nearby! Start butchering anyway?" -> "Zombie is nearby! Start butchering anyway?"