feat: add abstraction around task

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/agent.rs

@@ -5,6 +5,7 @@ use refresh::AgentRefresh;
 pub use config::setup_config;
 
 pub mod models;
+pub(crate) mod task;
 
 mod agent_state;
 mod config;