introduce sql model modules

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

src/models/mod.rs

@@ -0,0 +1,22 @@
+/*
+ * advotracker - Hotline tackingtool for Advocats
+ *
+ * Copyright 2020 Ralf Zerres <ralf.zerres@networkx.de>
+ * SPDX-License-Identifier: (0BSD or MIT)
+ */
+
+/// defining roles
+pub mod roles;
+
+/// defining harms
+pub mod harms;
+
+/// defining users
+pub mod users;
+
+/// defining user roles
+pub mod user_roles;
+
+// methods used for: INSERT
+//pub mod insert;
+//use insert::types::*;