feat(tls/server-extract): extract server-side TLS code into alknet-tls
Phase 1, Task 2 of crate extraction. Extracts server-side TLS setup code
from alknet-core/endpoint.rs into alknet-tls:
- server.rs: TlsServerConfig, build_rustls_server_config, RawKeyCertResolver,
AcceptAnyCertVerifier, SelfSignedCert, generate_self_signed_cert
- signing.rs: Ed25519SigningKey (shared, used by both server and client)
- pem.rs: load_cert_chain, load_private_key (shared)
- lib.rs: TlsError enum (Config, Io, Cert variants)
- Cargo.toml: added futures dependency for ACME feature
Old code in endpoint.rs stays (duplicated). No breakage.
deepseek-v4-pro
114cd73a21