multiline_repl do not need to depend on RubyLex

[tompng]

In master, it seems that test_yamatanooroti fails.

% bundle exec ruby -Ilib test/reline/yamatanooroti/multiline_repl
Multiline REPL.
/Users/tomoya/.rbenv/versions/3.2.0/lib/ruby/gems/3.2.0/bundler/gems/irb-5c8d3df2df3c/lib/irb/ruby-lex.rb:19:in `initialize': wrong number of arguments (given 0, expected 1) (ArgumentError)
	from test/reline/yamatanooroti/multiline_repl:197:in `new'
	from test/reline/yamatanooroti/multiline_repl:197:in `<main>'

class TerminationChecker < RubyLex now needs context in constructor and multiline_repl does not work now.
I'm also opening a pull request in irb (ruby/irb#500) that deletes RubyLex#process_nesting_level and RubyLex#process_literal_type and it will also breaks reline's test.
I think multiline_repl don't need to depend on RubyLex.

I implement simple TerminationChecker.terminated? and AutoIndent#calculate_indent that only looks if def end, brackets and parenthesis.

I also find that ruby -Ilib test/reline/yamatanooroti/multiline_repl --auto-indent was not working, no indent was applied.

opt.on('--auto-indent') {
  AutoIndent.new # makes an instance of AutoIndent but doing nothing
}

% bundle exec ruby -Ilib test/reline/yamatanooroti/multiline_repl --auto-indent
Multiline REPL.
prompt> if 1
prompt> if 2
prompt> end
prompt> end
=> nil
↓
% bundle exec ruby -Ilib test/reline/yamatanooroti/multiline_repl --auto-indent
Multiline REPL.
prompt> if 1
prompt>   if 1
prompt>   end
prompt> end
=> nil

[tompng]

Test failed but I think it's a random failure

<"Multiline REPL.\n" + "prompt> def hoge\n" + "prompt>   0123456789\n"> expected but was
<"Multiline REPL.\n" + "prompt> def hog^N\n" + "prompt>   0123456789\n">

Test passed in my forked repository
https://github.com/tompng/reline/actions/runs/3918425875

[hasumikin]

Nice one👍