Add Copy-to-Clipboard Button for All Tool Outputs

[Shalini828]

Many tools generate formatted outputs such as JSON, timestamps, encoded strings, or converted code. Add a reusable copy-to-clipboard button component that allows users to quickly copy the generated output from any tool.

Expected Features :

• Reusable CopyButton component
• Works across all output fields
• Visual feedback (Copied ✓ message)
• Accessible and responsive UI

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Thanks !