docs(uikit): add "Why Use the Storage Plugin?" section with real-world examples

[pasevin]

Documentation Pull Request

Summary

Three documentation improvements across the UIKit Storage and Components pages, based on a full audit of the openzeppelin-ui package source code:

1. Storage page — "Why Use the Storage Plugin?" section (previous commits)

• Comparison table: localStorage vs @openzeppelin/ui-storage (IndexedDB)
• Real-world examples from UI Builder and Role Manager
• Account alias plugin screenshot with side-by-side layout

2. Storage page — React Hook Factories section (new)

• Documents createRepositoryHook — the main factory that combines live queries, CRUD, and file I/O into a single hook
• Documents lower-level factories: createLiveQueryHook, createCrudHook, createJsonFileIO
• Includes complete code examples and a return-value reference table

3. Components page — missing UI primitives and form fields (new)

• Added 11 missing general components: Calendar/DateRangePicker, DropdownMenu, EmptyState, ExternalLink, Form, Header/Footer, Popover, Sonner
• Added 3 missing blockchain-specific components: NetworkIcon, NetworkStatusBadge, ViewContractStateButton
• Added 6 missing form field types: CodeEditorField, DateTimeField, FileUploadField, PasswordField, UrlField, ArrayObjectField

storage_hooks_and_components_tables_walkthrough.mp4

React Hook Factories section on Storage page
Updated General Components table
Updated Form Fields table

Type of Change

• New documentation
• Documentation update/revision
• Fix typos or grammar
• Restructure/reorganize content
• Add examples or tutorials
• Update API documentation
• Other: ___________

Related Issues

N/A

Checklist

• Build succeeds locally with pnpm run build
• Lint is successful when running pnpm run check
• Docs follow OpenZeppelin Documentation Standards

Additional Notes

This PR targets the cursor/openzeppelin-uikit-documentation-5e15 branch where the UIKit docs are being developed. All new content was sourced from the actual package exports in openzeppelin-ui and validated against real usage in the UI Builder and Role Manager repos.

_{To show artifacts inline, enable in settings.}