add brew autoremove to setup.sh, and support apple/Intel silicon mac

[sensuikan1973]

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[sensuikan1973]

Second path fragment must not be a drive or UNC name.

[sensuikan1973]

+/Users/runner/dotfiles/ruby/setup.sh:10> bash
Checking for `rbenv' in PATH: multiple
  You seem to have multiple rbenv installs in the following locations.
  Please pick just one installation and remove the others.
  
  /opt/homebrew/opt/rbenv/bin/rbenv
  /opt/homebrew/bin/rbenv
  /opt/homebrew/bin/rbenv

Checking for rbenv shims in PATH: OK
Checking `rbenv install' support: multiple
  You seem to have multiple `rbenv-install' in the following locations.
  Please pick just one installation and remove the others.
  
  /opt/homebrew/opt/ruby-build/bin/rbenv-install
  /opt/homebrew/bin/rbenv-install

[sensuikan1973]

Checking for `nodenv' in PATH: multiple
  You seem to have multiple nodenv installs in the following locations.
  Please pick just one installation and remove the others.
  
  /opt/homebrew/opt/nodenv/bin/nodenv
  /opt/homebrew/bin/nodenv
  /opt/homebrew/bin/nodenv
Checking for nodenv shims in PATH: OK
Checking `nodenv install' support: multiple
  You seem to have multiple `nodenv-install' in the following locations.
  Please pick just one installation and remove the others.
  
  /opt/homebrew/opt/node-build/bin/nodenv-install
  /opt/homebrew/bin/nodenv-install
Counting installed Node versions: 1 versions
Auditing installed plugins: OK