feature/add impl (#6)

* format code

* with object gen and args

* add implementation

* add rust generator

* reset generated code

* add basic output

* reset output

* add object

* add format function

* with opts

* fix vec

* add context to unwrap

* fix arguments

* with function body

* first complete generation: Still missing Vec<Obj>

* run full alpine

* add roadmap item

crates/dagger-codegen/src/rust/templates/enum_tmpl.rs

@@ -0,0 +1,33 @@
+use dagger_core::introspection::FullType;
+use genco::prelude::rust;
+use genco::quote;
+
+fn render_enum_values(values: &FullType) -> Option<rust::Tokens> {
+    let values = values
+        .enum_values
+        .as_ref()
+        .into_iter()
+        .map(|values| {
+            values
+                .into_iter()
+                .map(|val| quote! { $(val.name.as_ref()) })
+        })
+        .flatten()
+        .collect::<Vec<_>>();
+
+    let mut tokens = rust::Tokens::new();
+    for val in values {
+        tokens.append(val);
+        tokens.push();
+    }
+
+    Some(tokens)
+}
+
+pub fn render_enum(t: &FullType) -> eyre::Result<rust::Tokens> {
+    Ok(quote! {
+        pub enum $(t.name.as_ref()) {
+            $(render_enum_values(t))
+        }
+    })
+}