Update <CldUploadButton> component

[max-programming]

This PR updates the example for the <CldUploadButton> component. The changes are as follows

1. Updated Dependencies
2. Added appropriate header and footer
3. Customized the CldUploadButton, wrapped the demo in a card
4. Added App Router example
5. Removed unnecessary code
6. Added Tailwind CSS
7. Added toasts to show error and success messages
8. Use CldImage and CldVideoPlayer to display the uploaded media

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[colbyfayock]

i appreciate you adding Sonner, great library, but generally i want to keep the examples as MVP as possible, avoiding dependencies where we can, i think in this example we can maintain just updating the page with state to show the image/url

the rest looks good to me!

[max-programming]

@colbyfayock Done

[colbyfayock]

hey @max-programming im not sure whats going on but im getting some funky conflicts after merging in your other upload widget example, can you take al ook at this? idk if we need to just delete it and readd it or osmething

[max-programming]

@colbyfayock I opened #160 with the changes now