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-server/Cargo.toml

@@ -0,0 +1,91 @@
+[package]
+name        = "quicprochat-server"
+version     = "0.1.0"
+edition.workspace     = true
+description = "Delivery Service and Authentication Service for quicprochat."
+license     = "AGPL-3.0-only"
+repository.workspace  = true
+
+[features]
+traffic-resistance = []
+webtransport = ["dep:h3", "dep:h3-quinn", "dep:h3-webtransport", "dep:http"]
+
+[[bin]]
+name = "qpc-server"
+path = "src/main.rs"
+
+[dependencies]
+quicprochat-core       = { path = "../quicprochat-core" }
+quicprochat-proto      = { path = "../quicprochat-proto" }
+quicprochat-plugin-api = { path = "../quicprochat-plugin-api" }
+quicprochat-kt         = { path = "../quicprochat-kt" }
+quicprochat-rpc        = { path = "../quicprochat-rpc" }
+
+# Dynamic plugin loading
+libloading = "0.8"
+
+# Serialisation + RPC
+capnp         = { workspace = true }
+capnp-rpc     = { workspace = true }
+prost         = { workspace = true }
+bytes         = { workspace = true }
+
+# Async
+tokio         = { workspace = true }
+tokio-util    = { workspace = true }
+futures       = { workspace = true }
+
+# Server utilities
+dashmap       = { workspace = true }
+hex           = { workspace = true }
+sha2          = { workspace = true }
+tracing       = { workspace = true }
+tracing-subscriber = { workspace = true }
+quinn         = { workspace = true }
+quinn-proto   = { workspace = true }
+rustls        = { workspace = true }
+rcgen         = { workspace = true }
+x509-parser   = { workspace = true }
+
+# Crypto — OPAQUE PAKE
+opaque-ke     = { workspace = true }
+rand          = { workspace = true }
+subtle        = { workspace = true }
+zeroize       = { workspace = true }
+
+# Database
+rusqlite      = { workspace = true }
+
+# Error handling
+anyhow        = { workspace = true }
+thiserror     = { workspace = true }
+bincode       = { workspace = true }
+serde         = { workspace = true }
+serde_json    = { workspace = true }
+
+# CLI
+clap          = { workspace = true }
+toml          = { version = "0.8" }
+
+# WebSocket JSON-RPC bridge for browser clients
+tokio-tungstenite = "0.26"
+base64            = "0.22"
+
+# Metrics (Prometheus)
+metrics                    = "0.22"
+metrics-exporter-prometheus = "0.15"
+
+# mDNS service announcement for local mesh / Freifunk node discovery.
+mdns-sd = "0.12"
+
+# WebTransport (HTTP/3) — feature-gated, for browser clients.
+h3                = { version = "0.0.8", optional = true }
+h3-quinn          = { version = "0.0.10", features = ["datagram"], optional = true }
+h3-webtransport   = { version = "0.1", optional = true }
+http              = { version = "1", optional = true }
+
+[lints]
+workspace = true
+
+[dev-dependencies]
+tempfile = "3"