feat: Add comprehensive ControlledSelect Storybook stories

- Add 10 comprehensive story variants for ControlledSelect component
- Cover basic single select, default values, validation, loading states
- Include custom option rendering using Select compound components
- Add disabled state, error state, and size variants
- Include complex form integration and interactive demo
- Follow established pattern from ControlledInput.stories.tsx
- Use react-hook-form directly without react-router dependencies

Note: Multi-select and searchable/creatable variants not included
as they are not currently supported by the base Select component

Author: codegen-sh[bot]