Initial commit: Rampart v0.2.0

Multi-layer DDoS protection for Minecraft servers.

- rampart-core: Edge node with XDP/eBPF + Rust L7 filtering
- rampart-manager: REST API with JWT auth, Redis sync
- rampart-cli: CLI tool for operators
- velocity-plugin: Domain check, HMAC verify, server registry, load balancer
- paper-plugin: Auto-registration, heartbeat, HMAC verify
- dashboard: React + Vite web UI for management

crates/rampart-core/Cargo.toml

@@ -0,0 +1,39 @@
+[package]
+name = "rampart-core"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+tokio.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+tracing.workspace = true
+tracing-subscriber.workspace = true
+thiserror.workspace = true
+anyhow.workspace = true
+dashmap.workspace = true
+crossbeam.workspace = true
+hex.workspace = true
+sha2.workspace = true
+hmac.workspace = true
+subtle.workspace = true
+socket2 = { workspace = true, features = ["all"] }
+prometheus.workspace = true
+toml.workspace = true
+futures.workspace = true
+
+redis = { version = "0.27", optional = true, features = ["tokio-comp"] }
+maxminddb = { version = "0.30", optional = true }
+tokio-splice = { version = "0.2", optional = true }
+libbpf-rs = { version = "0.24", optional = true }
+
+[features]
+default = ["store-redis"]
+store-redis = ["dep:redis"]
+geoip = ["dep:maxminddb"]
+xdp = ["dep:libbpf-rs"]
+io-uring = ["dep:tokio-splice"]