Added Pulsing Button Project

[anu-ushka]

• A simple CSS-only pulsing button effect created without using JavaScript.
• The button expands and fades out smoothly to give a glowing pulse animation.
• Also attaching the output video for reference.
• https://drive.google.com/file/d/1Z2diTpTdzpN57nnkzCn7anBEHWDRcDl4/view?usp=sharing

[aayush105]

@anu-ushka

you have 2 different project committed in the same pr, also like add the pulse button project in its respective button folder.

Please make 2 separate pr for 2 different projects.