advotracker: restructure project using crate tree

* advotracker: the framework crate
* crate/advotrackerdb: crate implementing the database backend
* crate/advotrackerd: the backend daemon
* crate/adovtracker: the application (CLI and GUI)

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

crates/advotrackerdb/diesel.toml

@@ -0,0 +1,8 @@
+# For documentation on how to configure this file,
+# see https://diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"
+#filter = { only_tables = [ "User", "UserRole" ] }
+# includes the "#![allow(missing_docs)]"
+patch_file = "src/missing_docs.patch"