[Documentation] Add documentation for batch 5 components

[djalmaaraujo]

Related Issue

Continues from #337 (batch 4 documentation)

Description

Adds documentation files for the final batch of components:

• Skeleton - Placeholder while content is loading
• Switch - Toggle control for checked/unchecked states
• Table - Responsive table component with caption, header, body, and footer
• Tabs - Layered sections of content displayed one at a time
• Textarea - Multi-line text input field
• ThemeToggle - Toggle between dark/light theme modes
• Tooltip - Popup displaying information on hover/focus
• Typography - Sensible defaults for headings, text, links, and lists

Also adds missing stub methods required by typography documentation:

• Components.Heading - Module-level heading method
• Components.TypographyList - Typography list component
• InlineCode - Inline code block helper
• docs_installation_path - Route helper stub

Testing Instructions

1. Add to your Rails app's Gemfile:

   gem "ruby_ui", path: "../ruby_ui"

2. Remove any existing doc files that may conflict:

   rm -f app/views/docs/skeleton.rb
   rm -f app/views/docs/switch.rb
   rm -f app/views/docs/table.rb
   rm -f app/views/docs/tabs.rb
   rm -f app/views/docs/textarea.rb
   rm -f app/views/docs/theme_toggle.rb
   rm -f app/views/docs/tooltip.rb
   rm -f app/views/docs/typography.rb

3. Run the docs generator:

   bin/rails g ruby_ui:install:docs

4. Verify files were created:

   ls app/views/docs/skeleton.rb
   ls app/views/docs/switch.rb
   ls app/views/docs/table.rb
   ls app/views/docs/tabs.rb
   ls app/views/docs/textarea.rb
   ls app/views/docs/theme_toggle.rb
   ls app/views/docs/tooltip.rb
   ls app/views/docs/typography.rb

5. Run the test suite:

   bundle exec rake