v0.2.0 of pqforge

Pure-Dart post-quantum and classical hybrid crypto for Dart, Flutter, and Serverpod: ML-KEM/ML-DSA envelopes, streaming, multi-recipient encryption, signing, and a CLI. Changelog excerpt: Post-quantum + classical hybrid encryption, bounded-memory gigabyte-scale streaming, multi-recipient envelopes, selectable AEAD suites, and a ~10× faster default engine — all on the pure-Dart, web-safe core. ### Hybrid (ML-KEM + X25519) encryption - End-to-end hybrid KEM-DEM: the DEM key is the IETF concatenate-then-KDF combination of the ML-KEM shared secret and an ephemeral X25519 exchange (PqHybridKemDem), so confidentiality holds while eitherModule-LWE or Curve25519 stands. The self-de[...]