Support for modern cryptographic algorithms in Workers

Cloudflare Workers now exposes opt-in post-quantum-resistant Web Crypto primitives (ML-KEM-768/1024 for KEM and ML-DSA-44/65/87 for signatures) and helper APIs (encapsulateBits/decapsulateBits, encapsulateKey/decapsulateKey, getPublicKey, SubtleCrypto.supports, and JWK import/export) behind the webcrypto_modern_algorithms compatibility flag; the post gives usage examples (KEM, DSA, HPKE, JWT signing), implementation notes (workerd backed by BoringSSL), testing details, current limitations, and guidance for developers to experiment with migrating to post-quantum algorithms.