refactor!: replace pack! macros with derive-based pipeline types

Remove the `pack!`, `pack_err!`, `pack_structural!`, and
`pack_err_structural!` macros, replacing all pipeline type definitions
with `#[derive(Grouped)]` and `#[derive(Grouped, Wrap)]` attributes.
This changes the generated struct shape from named-field structs with an
`inner` field to tuple structs accessed via `.0`, and removes the
auto-generated `name` and `info` fields from error types.

1 files changed, 4 insertions, 3 deletions

diff --git a/mingling_cli/src/metadata/cmd_metadata.rs b/mingling_cli/src/metadata/cmd_metadata.rs
index 3ee9f09..7f8d4ad 100644
--- a/mingling_cli/src/metadata/cmd_metadata.rs
+++ b/mingling_cli/src/metadata/cmd_metadata.rs
@@ -1,7 +1,7 @@
 use cargo_metadata::Metadata;
 use mingling::{
-    LazyRes,
-    macros::{chain, dispatcher, metadata, pack},
+    Grouped, LazyRes, Wrap,
+    macros::{chain, dispatcher, metadata},
     metadata::Description,
 };
 
@@ -16,7 +16,8 @@ pub fn desc_metadata() -> Description {
         .into()
 }
 
-pack!(ResultMetadata = ResMetadata);
+#[derive(Grouped, Wrap)]
+pub struct ResultMetadata(ResMetadata);
 
 #[chain]
 pub fn handle_metadata(_: EntryMetadata, metadata: &mut LazyRes<ResMetadata>) -> Metadata {