chore: release v0.0.8

[github-actions]

🤖 New release

• purecrypto: 0.0.7 -> 0.0.8 (✓ API compatible changes)

Changelog

0.0.8 - 2026-05-26

Added

• (tls) SSLKEYLOGFILE support via Config::key_log
• (ffi) memory-BIO TLS 1.2/1.3 + DTLS 1.2/1.3 (sans-I/O C ABI)
• (ffi) ML-KEM, ML-DSA, SLH-DSA, RSA-PSS, RSA-OAEP, CSR, CRL
• (ffi) AEAD, KW, KDF, HMAC widening, ECDH, X25519
• (cli) kem, kex, pkeyutl, crl subcommands
• (cli) mac, kdf, enc subcommands for HMAC + HKDF/PBKDF2/scrypt/Argon2 + AEAD encryption

Fixed

• (cli) s_client must drain pre-buffered plaintext before sock.read
• (cli) drain pre-buffered plaintext after handshake; non-blocking -www
• (cli) s_server -www must feed received bytes into TLS engine

Other

• (tls) unified tls::Config for TLS+DTLS, client+server
• full CLI + C-API coverage table; tests/ffi_smoke ties to public surface

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