feat: add rust actions

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

crates/cuddle-please-actions/src/actions.rs

@@ -0,0 +1,9 @@
+use semver::Version;
+
+use crate::ActionConfig;
+
+pub trait Action {
+    fn enabled(&self, config: &ActionConfig) -> anyhow::Result<bool>;
+    fn name(&self) -> String;
+    fn execute(&self, version: &Version) -> anyhow::Result<()>;
+}