feat: Add bootc support (#448)

Adds support for using `bootc` as the preferred method for booting from
a locally created image. This new method gets rid of the need to create
a tarball and move it to the correct place and instead it will make use
of `podman scp` which copies the image to the root `containers-storage`
and then has `rpm-ostree` and `bootc` boot from that store.

Closes #418 
Closes #200

recipe/src/recipe.rs

@@ -138,7 +138,7 @@ impl Recipe<'_> {
     }
 
     #[must_use]
-    pub fn get_secrets(&self) -> HashSet<&Secret> {
+    pub fn get_secrets(&self) -> Vec<&Secret> {
         self.modules_ext
             .modules
             .iter()
@@ -154,6 +154,8 @@ impl Recipe<'_> {
                     .filter_map(|module| Some(&module.required_fields.as_ref()?.secrets))
                     .flatten(),
             )
+            .collect::<HashSet<_>>()
+            .into_iter()
             .collect()
     }
 }