feat: add basic environment sharing

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

crates/cuddle-clusters/tests/environment/cuddle.yaml

@@ -0,0 +1,3 @@
+cuddle/clusters:
+  dev:
+  prod:

crates/cuddle-clusters/tests/environment/expected/dev/some.yaml

@@ -0,0 +1 @@
+env: dev

crates/cuddle-clusters/tests/environment/expected/prod/some.yaml

@@ -0,0 +1 @@
+env: prod

crates/cuddle-clusters/tests/environment/templates/clusters/some.yaml.jinja2

@@ -0,0 +1 @@
+env: {{ environment }}

crates/cuddle-clusters/tests/jinja/cuddle.yaml

@@ -0,0 +1,2 @@
+cuddle/clusters:
+  dev:

crates/cuddle-clusters/tests/jinja/expected/dev/some.yaml

@@ -0,0 +1 @@
+some_file: 4

crates/cuddle-clusters/tests/jinja/templates/clusters/some.yaml.jinja2

@@ -0,0 +1 @@
+some_file: {{ 2 + 2 }}

crates/cuddle-clusters/tests/tests.rs

@@ -23,3 +23,17 @@ async fn both() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[tokio::test]
+async fn jinja() -> anyhow::Result<()> {
+    run_test("jinja").await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn environment() -> anyhow::Result<()> {
+    run_test("environment").await?;
+
+    Ok(())
+}