Enhancement Request: independent `fight` library

## Mark the library (libraries) to which the enhancement applies

- [ ] `couchsurf`
- [ ] `gitit`    
- [ ] `helper`
- [x] `persona`
- [ ] `inventory`
- [ ] `marketplace`
- [ ] `narrator` 
- [ ] `resources`
- [ ] `worldlib` 
- [ ] `notary`   

## Describe the desired enhancement

Add ability for `passive` and `aggressive` NPCs via `fight` library.
