Add workbench component showcase app

[munezaclovis]

Summary

• Migrates the example-mog showcase into the Orchestra Testbench workbench/ directory, creating a self-contained component demo that runs alongside the package
• Sets up pnpm workspace with Vite (workbench CSS/JS) running in parallel with esbuild (package JS) via pnpm dev
• Adds a Livewire v4 SFC index page with 20+ demo components (payment form, avatar group, badges, spinners, input groups, sliders, radio groups, switches, theme switcher, etc.)
• Fixes blade icon prefix from lucide: to lucide- in 4 package components (accordion, select, pagination, spinner)

Dev workflow

pnpm install                        # install workbench deps via workspace
pnpm dev                            # esbuild watch + Vite dev server in parallel
composer serve                      # testbench serve on port 8000

Test plan

• All 36 non-browser tests pass (vendor/bin/pest --ci --exclude-group=browser)
• Workbench page renders at http://localhost:8000/ with title "Mog UI"
• All demo components render correctly (payment form, avatars, badges, input groups, etc.)
• Theme switcher toggles dark/light mode correctly
• CSS and JS assets serve correctly via Vite production build
• pnpm install bootstraps workspace without errors