refactor: structure of an hexagonal architecture

Created a kernel crate to store models and future action implementations.
Will be useful to create admin cli.

lib/kernel/src/models/user.rs

@@ -0,0 +1,31 @@
+use fully_pub::fully_pub;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use sqlx::types::Json;
+
+#[derive(sqlx::Type, Clone, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(strum_macros::Display)]
+#[fully_pub]
+enum UserStatus {
+    Active,
+    Disabled
+}
+
+#[derive(sqlx::FromRow, Deserialize, Serialize, Debug)]
+#[fully_pub]
+struct User {
+    /// uuid
+    id: String,
+    handle: String,
+    full_name: Option<String>,
+    email: Option<String>,
+    website: Option<String>,
+    picture: Option<Vec<u8>>, // embeded blob to store profile pic
+    password_hash: Option<String>, // argon2 password hash
+    status: UserStatus,
+    roles: Json<Vec<String>>,
+    activation_token: Option<String>,
+
+    last_login_at: Option<DateTime<Utc>>,
+    created_at: DateTime<Utc>
+}