fix(a11y): add dev warning for buttons missing accessible names

[Kalpana-chavhan]

What this PR does

This PR adds a non-breaking accessibility check to the Button component that warns developers when a button is visually "empty" (icon-only, loading-only, or square) and lacks an ARIA label.

Why is this needed?

To ensure WCAG 2.1 compliance. Icon-only buttons are unusable for screen reader users unless an aria-label is provided. This warning helps developers catch these omissions during development.

Changes

• Updated Button.tsx to include Children from React.
• Added logic to detect "visual-only" buttons.
• Included a console.warn wrapped in a production-environment check.

Testing

1. Render <Button icon="edit" /> -> Console should show warning.
2. Render <Button icon="edit" aria-label="Edit" /> -> No warning.
3. Render <Button>Save</Button> -> No warning.

closes #1810

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