refactor taskchampion::task into submodules

taskchampion/src/task/mod.rs

@@ -0,0 +1,18 @@
+#![allow(clippy::module_inception)]
+use chrono::prelude::*;
+
+mod annotation;
+mod priority;
+mod status;
+mod tag;
+mod task;
+
+pub use annotation::Annotation;
+pub use priority::Priority;
+pub use status::Status;
+pub use tag::{Tag, INVALID_TAG_CHARACTERS};
+pub use task::{Task, TaskMut};
+
+use tag::SyntheticTag;
+
+pub type Timestamp = DateTime<Utc>;