Move Explore All Tables to Separate Page

What

This MR moves the "Explore All Tables" view from sharding_keys.erb into its own dedicated page. Here's what was done (entirely by Duo):

Created New Template

Created templates/explore_tables.erb - A new dedicated template for the "Explore All Tables" functionality with:

• Clean, focused interface for table exploration
• All the original filtering capabilities (Status, Schema, Table Size, Feature Category, etc.)
• Responsive table with sortable columns
• Smart floating jump button for navigation
• Consistent styling and navigation with other pages

Updated Original Template

Modified templates/sharding_keys.erb to:

• Remove the entire "Explore All Tables" <details> section
• Replace it with a simple button link to the new dedicated page
• Remove all related JavaScript code for table filtering
• Clean up the page to focus on its core sharding key progress functionality

Updated Data Generation Script

Modified scripts/sharding_keys/data.rb to:

• Include the new explore_tables.erb template in the HTML generation
• Generate the new explore_tables.html file in the public directory

Updated Navigation

Updated all navigation dropdowns across templates to include the new "Explore all tables" link:

• templates/sharding_keys.erb
• templates/explore_tables.erb
• templates/sharding_summary.erb
• scripts/schema_migration/data.rb
• scripts/cells_10/data.rb

Benefits of This Change

• Better User Experience: The table exploration functionality now has its own dedicated page with more space and focus
• Improved Performance: The main sharding keys page loads faster without the heavy table filtering JavaScript
• Better Organization: Separates concerns - the main dashboard shows progress, while the dedicated page allows detailed exploration
• Consistent Navigation: All pages now have consistent navigation with the new explore tables option
• Maintainability: Easier to maintain and enhance the table exploration features independently
• The new page will be accessible at /explore_tables and provides the same powerful filtering and search capabilities that were previously embedded in the sharding keys page, but now in a dedicated, focused interface.