Add maximum_statements and ignore_if_case options to prefer_early_return rule #343

The ESLint implementation of the rule has a maximumStatements parameter (set to 1 by default), which skips the analysis if the number of statements inside the block does not exceed maximumStatements.
https://github.com/regru/eslint-plugin-prefer-early-return

We can also add an ignore-if-case parameter, similar to DCM (https://dcm.dev/docs/rules/common/prefer-early-return/#example-with-ignore-if-case), to ignore the rule for the if-case case.

I suggest adding these parameters to the prefer_early_return rule (maximum_statements: 1 and ignore_if_case: true by default).

We could also consider extending the rule to apply to loop bodies:

so instead of

for ... {
  if ... {
    a
    b
    ...
  }
}

it will propose

for ... {
  if !... continue;

  a
  b
}