Add project structure and roadmap documentation

- Created `project-structure.md` to outline the directory layout, crate dependencies, design principles, module guidelines, and naming conventions for the NxMesh codebase.
- Introduced `roadmap.md` detailing the development phases, milestones, tasks, deliverables, and resource requirements for the NxMesh project, spanning from foundational setup to enterprise features.

Cargo.toml

@@ -1,13 +1,80 @@
 [workspace]
 members = [
+    "crates/nxmesh-core",
+    "crates/nxmesh-proto",
+    "crates/nxmesh-master",
+    "crates/nxmesh-agent",
+    "crates/nxmesh-cli",
+    "migrations/sea-orm",
 ]
-
 resolver = "3"
 
-[workspace.lints.clippy]
-module_inception = "allow"
+[workspace.package]
+version = "0.1.0"
+edition = "2021"
+authors = ["NxMesh Team"]
+license = "GNU General Public License v3.0"
+repository = "https://github.com/nxmesh/nxmesh"
+rust-version = "1.80"
 
 [workspace.dependencies]
-sea-orm = "2.0.0-rc"
-sea-orm-cli = "2.0.0-rc"
+# Core dependencies
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+thiserror = "1"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+
+# Web framework
+axum = "0.7"
+tower = "0.4"
+tower-http = { version = "0.5", features = ["trace", "cors", "fs"] }
+
+# gRPC
+tonic = "0.11"
+prost = "0.12"
+
+# Database
+sea-orm = { version = "2.0.0-rc", features = ["sqlx-postgres", "runtime-tokio-native-tls"] }
 sea-orm-migration = "2.0.0-rc"
+
+# Async
+async-trait = "0.1"
+futures = "0.3"
+
+# Configuration
+toml = "0.8"
+config = "0.14"
+
+# HTTP client
+reqwest = { version = "0.12", default-features = false, features = ["rustls-tls", "json"] }
+
+# Crypto
+sha2 = "0.10"
+hex = "0.4"
+argon2 = "0.5"
+jsonwebtoken = "9"
+
+# Validation
+validator = { version = "0.18", features = ["derive"] }
+
+# Time
+chrono = { version = "0.4", features = ["serde"] }
+
+# UUID
+uuid = { version = "1", features = ["v4", "serde"] }
+
+# Templating
+handlebars = "5"
+
+# CLI
+clap = { version = "4", features = ["derive"] }
+
+# Testing
+tokio-test = "0.4"
+mockall = "0.12"
+
+# NxMesh internal
+nxmesh-core = { path = "crates/nxmesh-core" }
+nxmesh-proto = { path = "crates/nxmesh-proto" }