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/database.rs

@@ -0,0 +1,21 @@
+use anyhow::{Context, Result};
+use sqlx::{sqlite::{SqliteConnectOptions, SqlitePoolOptions}, ConnectOptions};
+use std::str::FromStr;
+
+use crate::repositories::storage::Storage;
+
+pub async fn prepare_database(sqlite_db_path: &str) -> Result<Storage> {
+    let conn_str = format!("sqlite:{}", sqlite_db_path);
+
+    let pool = SqlitePoolOptions::new()
+        .max_connections(50)
+        .connect_with(
+            SqliteConnectOptions::from_str(&conn_str)?
+                .log_statements(log::LevelFilter::Trace)
+        )
+        .await
+        .context("could not connect to database_url")?;
+
+    Ok(Storage(pool))
+}
+