added initial roadmap and implementation

auth/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "auth"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+common = { workspace = true }
+tokio = { workspace = true }
+axum = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+sqlx = { workspace = true }
+tracing = { workspace = true }
+argon2 = { workspace = true }
+jsonwebtoken = { workspace = true }
+rand = { workspace = true }
+chrono = { workspace = true }
+uuid = { workspace = true }
+anyhow = { workspace = true }
+sha2 = { workspace = true }
+oauth2 = "5.0.0"
+reqwest = { version = "0.13.2", features = ["json"] }
+validator = { version = "0.20.0", features = ["derive"] }