ruby-ts-mode: Fix indent after operator or conditional

ruby-ts-mode: Fix indent after operator or conditional

Make it match ruby-mode's indentation behavior.

* lisp/progmodes/ruby-ts-mode.el (ruby-ts--binary-indent-anchor):
New function.
(ruby-ts--indent-rules): Use it instead of a composite matcher.
Add a rule for 'conditional'.
(ruby-ts--assignment-ancestor, ruby-ts--is-in-condition)
(ruby-ts--endless-method): Remove.

* test/lisp/progmodes/ruby-mode-resources/ruby-ts.rb:
Add examples.