Cop idea: Redundant safe navigation for basic types

[ydakuka]

Describe the solution you'd like

hsh = [['a', '1'], ['b', '2']]
# hsh = nil

# bad
hsh&.to_h { |k, v| [k, v] } || {}
# bad
hsh&.to_h || {}

# good
hsh.to_h { |k,v| [k, v] }
# good
hsh.to_h

arr = ['a', 'b', 'c']
# arr = nil

# bad
arr&.to_a || []

# good
arr.to_a

str = "foo"
# str = nil

# bad
str&.to_s || ''

# good
str.to_s

[koic]

Rather than creating a new cop, extending the existing Lint/RedundantSafeNavigation can be considered. (I'm not yet convinced which is the better option.)

[fatkodima]

I do not think we need a new cop, Lint/RedundantSafeNavigation can be extended, as it was once extended for constants.