added interactive mode (#44)

Co-authored-by: kjuulh <contact@kjuulh.io>
Reviewed-on: https://git.front.kjuulh.io/kjuulh/octopush/pulls/44

crates/octopush_core/src/ui/mod.rs

@@ -0,0 +1,12 @@
+pub mod terminal_ui;
+
+use std::sync::Arc;
+
+use async_trait::async_trait;
+
+#[async_trait]
+pub trait UI {
+    async fn confirm(&self) -> eyre::Result<()>;
+}
+
+pub type DynUI = Arc<dyn UI + Send + Sync>;