Added first draft database schema

src/schema.rs

@@ -0,0 +1,33 @@
+table! {
+    maintainers (id) {
+        id -> Uuid,
+        name -> Text,
+        email -> Text,
+    }
+}
+
+table! {
+    packages (id) {
+        id -> Uuid,
+        name -> Text,
+        #[sql_name = "type"]
+        type_ -> Package_type,
+        version -> Text,
+        source -> Nullable<Text>,
+        section -> Nullable<Text>,
+        priority -> Nullable<Text>,
+        architecture -> Text,
+        essential -> Nullable<Bool>,
+        installed_size -> Nullable<Int4>,
+        maintainer_id -> Uuid,
+        description -> Text,
+        homepage -> Nullable<Text>,
+    }
+}
+
+joinable!(packages -> maintainers (maintainer_id));
+
+allow_tables_to_appear_in_same_query!(
+    maintainers,
+    packages,
+);