Add RBS inline support for type annotations

[simaaaji]

Introduce the rbs-inline gem for Ruby type annotations, generate inline RBS for the page.rb file, and update relevant files to accommodate these changes.

[simaaaji]

@copilot

• Remove rbs inline comments from ruby files under test directory
• use sorbet gem for type check with rbs inline

[Copilot]

@simaaaji I've opened a new pull request, #13, to work on those changes. Once the pull request is ready, I'll request review from you.