Support detailed_message for NoTypeError, InheritModuleError, NoSelfTypeFoundError and NoMixinFoundError

[ksss]

Added support for #detailed_message for four errors.
This will aid in locating the problem when an error occurs.

NoTypeFoundError

a.rbs:1:11...1:19: Could not find NotFound (RBS::NoTypeFoundError)

  type foo = NotFound
             ^^^^^^^^

InheritModuleError

a.rbs:1:12...1:18: Cannot inherit a module: Kernel (RBS::InheritModuleError)

  class Foo < Kernel
              ^^^^^^

NoSelfTypeFoundError

a.rbs:1:13...1:21: Could not find self type: NotFound (RBS::NoSelfTypeFoundError)

  module Foo : NotFound
               ^^^^^^^^

NoMixinFoundError

a.rbs:2:2...2:18: Could not find mixin: NotFound (RBS::NoMixinFoundError)

    include NotFound
    ^^^^^^^^^^^^^^^^

ref: #1166

[soutaro]

Thanks! 🎉