feat: Add Pagy pagination with Turbo frames to invoices page

[OlegPhenomenon]

Implement independent pagination for all 5 invoice types using Pagy gem with Turbo frame integration for seamless navigation without page reloads.

Changes:

• Add ITEMS_PER_PAGE constant (10 items per page) to InvoicesController
• Implement Pagy pagination for all 5 invoice collections:
  • Issued invoices (issued_page param)
  • Cancelled payable invoices (cancelled_payable_page param)
  • Cancelled expired invoices (cancelled_expired_page param)
  • Paid invoices (paid_page param)
  • Deposit paid records (deposit_page param)
• Wrap each tab content with unique Turbo frames for independent updates
• Update Outstanding Invoices component:
  • Add pagy_issued, pagy_cancelled_payable, pagy_cancelled_expired attributes
  • Wrap 3 tabs with turbo_frame_tag: outstanding_issued_invoices, outstanding_cancelled_payable, outstanding_cancelled_expired
  • Add Pagy component at bottom of each frame
  • Update counters to use pagy.count instead of collection.count
• Update Paid Invoices component:
  • Add pagy_paid, pagy_deposit attributes
  • Wrap 2 tabs with turbo_frame_tag: paid_invoices, paid_deposits
  • Add Pagy component at bottom of each frame
  • Update counters to use pagy.count
• Uncomment Pagy::DEFAULT.freeze in initializer to allow runtime items customization
• Add debug logging for pagination troubleshooting
• Code formatting improvements in InvoicesController

Technical details:

• Each invoice type uses unique page_param to prevent pagination conflicts
• Turbo frames ensure only clicked tab updates (no full page reload)
• Tab state persists after pagination via URL parameters
• data-turbo-action="advance" enables browser history navigation