Update React on Rails to 16.0.1.rc.0

- Upgrade react_on_rails gem from 14.1.0.rc.0 to 16.0.1.rc.0
- Update react-on-rails npm package from 14.0.3 to 16.0.1-rc.0
- Update bundle dependencies including Rails to 8.0.2.1

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

Gemfile

@@ -5,7 +5,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby "3.3.4"
 
-gem "react_on_rails", "14.1.0.rc.0"
+gem "react_on_rails", "16.0.1.rc.0"
 gem "shakapacker", "8.0.0"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails"