NitroImg v1.0.0

Initial release of NitroImg - image optimization through the NitroShock Cloudflare Worker.

Added

• Cloudflare Worker optimization - image compression handled by the NitroShock edge worker, keeping WordPress fast.
• HMAC-SHA256 license auth - the reference authentication pattern later adopted across the NitroShock plugin family.
• Pay-per-use credits - credits are deducted only on a successful optimization.