feat(auth): add authentication protocol definitions and build configuration

- Add TokenClaims message for JWT payload structure with user id, issuer, timestamps, and scopes
- Implement IssueTokenRequest/Response for creating access and refresh tokens with TTL support
- Create RefreshTokenRequest/Response for token rotation functionality
- Define RevokeTokenRequest/Response with support for single token or user-wide revocation
- Add VerifyTokenRequest/Response for validating JWT tokens with detailed claims information
- Implement signing key distribution system with GetSigningKeysRequest/Response
- Create TokenService gRPC service with IssueToken, RefreshToken, RevokeToken, VerifyToken, and GetSigningKeys methods
- Add build.rs configuration to compile proto files using tonic_prost_build
- Include channel, channel_settings, member, and permission protocol definitions for IM services
- Generate Rust code bindings through pb/core.rs and pb/im.rs modules

Cargo.toml

@@ -0,0 +1,45 @@
+[package]
+name = "imks"
+version = "0.1.0"
+edition = "2024"
+
+
+[lib]
+path = "lib.rs"
+name = "imks"
+
+[[bin]]
+path = "main.rs"
+name = "imks"
+
+
+[dependencies]
+tonic = "0.14.6"
+prost = "0.14.3"
+prost-types = "0.14"
+tonic-build = "0.14.6"
+tonic-health = "0.14.6"
+tonic-prost = "0.14.6"
+tokio = { version = "1.52.3", features = ["full"] }
+actix-web = { version = "4.13.0", features = [] }
+actix-ws = { version = "0.4.0", features = [] }
+actix-rt = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = { version = "1" }
+base64 = "0.22"
+rand = "0.9"
+wtransport = "0.7"
+dashmap = "6"
+thiserror = "2"
+async-trait = "0.1"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+fred = { version = "10", features = ["subscriber-client"] }
+async-nats = "0.38"
+uuid = { version = "1", features = ["v4"] }
+futures-util = "0.3"
+
+
+[build-dependencies]
+tonic-prost-build = "0.14.6"
+walkdir = "2.5.0"