Shataakshi Foundation – Header Logo Update

Updated:
- Replaced text-based header branding with the supplied Shataakshi Foundation logo.
- Removed the separate "Shataakshi Foundation" and "Change Starts Here" text from the website header.
- Updated header logo sizing for desktop and mobile.
- Supplied logo copied to public/assets/images/logo.png.

The footer and page content still retain the organization name where appropriate.