Add missing shared library

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 members = [ 
     "apps/container",
+    "apps/shared",
     "public/database",
     "public/migration"
 ]

public/shared/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "shared"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+path = "src/lib.rs"
+
+[lints]
+workspace = true

public/shared/src/db_type.rs

@@ -0,0 +1,28 @@
+use std::str::FromStr;
+
+#[derive(Debug, Clone)]
+pub enum DBType {
+    PostgreSQL,
+    SQLite,
+}
+
+impl std::fmt::Display for DBType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DBType::PostgreSQL => write!(f, "PostgreSQL"),
+            DBType::SQLite => write!(f, "SQLite"),
+        }
+    }
+}
+
+impl FromStr for DBType {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "postgresql" | "postgres" => Ok(DBType::PostgreSQL),
+            "sqlite" => Ok(DBType::SQLite),
+            _ => Err(format!("Unknown DBType: {}", s)),
+        }
+    }
+}

public/shared/src/lib.rs

@@ -0,0 +1 @@
+pub mod db_type;