feat(linter): implement eslint(array-callback-return)

[YangchenYe323]

I tried implementing array-callback-return discussed in #218 based purely on AST.

I couldn't find an easy way to use the Visit trait for our task, i.e, given a Statement, find out whether it will return explicitly on all paths. The structure is like this (take IfStatement as an example):

fn visit_if_statement(s: &IfStatement) -> bool {
  let consequent = visit_statement(s.consequent)
  let alternate = visit_statement(s.alternate)
  consequent && alternate
}

The check for switch statement is even more complex with a lot of local computations.
Wonder if this can be translated to use the Visit trait and store the on-stack local states somewhere in the visitor.

[Boshen]

@magic-akari Do you want to review this as well? Some of this is beyond me 😁

[Boshen]

Amazing work!