fix(react): fix Select label margin issues

[brionmario]

Purpose

This pull request includes several changes to the Select component and its related files in the packages/react directory. The changes focus on code cleanup, improving the component's functionality, and updating styles.

Code Cleanup and Refactoring:

• packages/react/src/components/Select/Select.stories.mdx: Reorganized imports to ensure proper module paths and added a Stack component for layout purposes.
• packages/react/src/components/Select/Select.stories.mdx: Simplified the Template function and added an additional Select component to demonstrate version selection. [1] [2]

Component Enhancements:

• packages/react/src/components/Select/Select.tsx: Updated the InputLabelProps to always shrink the label and added default size and variant properties for the Select component.
• packages/react/src/components/Select/Select.tsx: Deprecated old class names in favor of new ones (OxygenSelectLabel-root and OxygenSelect-root) and added warnings for their removal in the next major release.

Style Updates:

• packages/react/src/components/Select/select.scss: Removed outdated styles and added new styles for the OxygenSelect-root class to fix layout issues.

Related Issues

• Fixes MUI's Select component's label has some alignment issues when used statically #171

Related PRs

• N/A

Checklist

• Figma Board Updated. (Mandatory for Icon and Component PRs. If you don't have access, please ask the core team to update it.)
• UX/UI review done on the final implementation.
• Story provided. (Add screenshots)
• Manual test round performed and verified.
• Unit tests provided. (Add links if there are any)
• Documentation provided. (Add links if there are any)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Ran ESLint & Prettier plugins and verified?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?