chore: rename quicproquo → quicprochat in Rust workspace

Rename all crate directories, package names, binary names, proto
package/module paths, ALPN strings, env var prefixes, config filenames,
mDNS service names, and plugin ABI symbols from quicproquo/qpq to
quicprochat/qpc.

crates/quicprochat-sdk/Cargo.toml

@@ -0,0 +1,39 @@
+[package]
+name = "quicprochat-sdk"
+version = "0.1.0"
+edition.workspace = true
+description = "Client SDK for quicprochat v2 — connect, auth, send, receive, subscribe"
+license     = "Apache-2.0 OR MIT"
+repository.workspace = true
+
+[dependencies]
+quicprochat-core  = { path = "../quicprochat-core" }
+quicprochat-proto = { path = "../quicprochat-proto" }
+quicprochat-rpc   = { path = "../quicprochat-rpc" }
+tokio            = { workspace = true }
+futures          = { workspace = true }
+tracing          = { workspace = true }
+thiserror        = { workspace = true }
+anyhow           = { workspace = true }
+serde            = { workspace = true }
+serde_json       = { workspace = true }
+bincode          = { workspace = true }
+hex              = { workspace = true }
+zeroize          = { workspace = true }
+rusqlite         = { workspace = true }
+argon2           = { workspace = true }
+rand             = { workspace = true }
+sha2             = { workspace = true }
+rustls           = { workspace = true }
+quinn            = { workspace = true }
+opaque-ke        = { workspace = true }
+chacha20poly1305 = { workspace = true }
+bytes            = { workspace = true }
+prost            = { workspace = true }
+
+[dev-dependencies]
+tokio = { workspace = true, features = ["test-util"] }
+tempfile = "3"
+
+[lints]
+workspace = true