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, 2 insertions, 1 deletions

diff --git a/examples/example-lazy-resources/src/main.rs b/examples/example-lazy-resources/src/main.rs
index cc1604a..2243f14 100644
--- a/examples/example-lazy-resources/src/main.rs
+++ b/examples/example-lazy-resources/src/main.rs
@@ -52,7 +52,8 @@ fn init_res_large_data() -> ResLargeData {
 dispatcher!("show", EntryShow);
 dispatcher!("none", EntryNone);
 
-pack!(ResultShow = BTreeMap<Key, Value>);
+#[derive(Grouped, Wrap)]
+pub struct ResultShow(BTreeMap<Key, Value>);
 
 fn main() {
     let mut program = ThisProgram::new();