Add 'did you mean' help for typos in terms

If the user makes a typo in a term (say, a field), we should try to offer a helpful correction instead of bailing.
```scala
record Person(name: String, age: Int)

val p = Person(...)

// examples
p.NamE // ~> Did you mean '.name'?
p.mame // ~> Did you mean '.name'?
p.namee // ~> Did you mean '.name'?
p.aeg // ~> Did you mean '.age'?
if (True) p.Show // ~> Did you mean 'true'? Did you mean 'show'?
```

A type-specific version of this is done in #1162, please see the changes there.

The code there should be reusable, though for things like fields / terms / functions, it might be helpful to have more than one recommendation (`.take(3)` instead of `.headOption`) and potentially tweak the heuristics a little bit.