feat: add ability to actually publish

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

crates/flux-releaser/src/services/cluster_list.rs

@@ -0,0 +1,23 @@
+use std::collections::HashMap;
+
+#[derive(Default)]
+pub struct ClusterList {}
+
+impl ClusterList {
+    pub async fn get_list(&self) -> anyhow::Result<HashMap<String, Vec<String>>> {
+        Ok(HashMap::from([
+            ("dev".into(), vec!["clank-dev".into()]),
+            ("prod".into(), vec!["clank-prod".into()]),
+        ]))
+    }
+
+    pub async fn get(&self, environment: &str) -> anyhow::Result<Option<Vec<String>>> {
+        let list = self.get_list().await?;
+
+        if let Some(x) = list.get(environment) {
+            Ok(Some(x.clone()))
+        } else {
+            Ok(None)
+        }
+    }
+}