ci(release): add workflow to deprecate old package names

[pasevin]

Summary

Adds a manual GitHub Actions workflow to deprecate the old @openzeppelin/ui-builder-* packages on npm and direct users to the new @openzeppelin/ui-* namespace.

Workflow Details

Trigger: Manual (workflow_dispatch)

Inputs:

• dry_run: Whether to show commands without executing (default: true)
• deprecation_message: Custom deprecation message

Packages to deprecate:

Old Package	New Package
@openzeppelin/ui-builder-types	@openzeppelin/ui-types
@openzeppelin/ui-builder-utils	@openzeppelin/ui-utils
@openzeppelin/ui-builder-styles	@openzeppelin/ui-styles
@openzeppelin/ui-builder-ui	@openzeppelin/ui-components
@openzeppelin/ui-builder-renderer	@openzeppelin/ui-renderer
@openzeppelin/ui-builder-react-core	@openzeppelin/ui-react
@openzeppelin/ui-builder-storage	@openzeppelin/ui-storage

Usage

1. Go to Actions tab
2. Select "Deprecate Old Packages" workflow
3. Click "Run workflow"
4. First run with dry_run: true to verify
5. Then run with dry_run: false to execute

Related

• New UI Kit repo: https://github.com/OpenZeppelin/openzeppelin-ui
• Migration guide: https://github.com/OpenZeppelin/openzeppelin-ui/blob/main/docs/MIGRATION.md