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/mod.rs

@@ -0,0 +1,4 @@
+pub mod enum_tmpl;
+pub mod input_tmpl;
+pub mod object_tmpl;
+pub mod scalar_tmpl;