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, 0 insertions, 10 deletions

diff --git a/examples/example-pack-err/page.toml b/examples/example-pack-err/page.toml
deleted file mode 100644
index 7423087..0000000
--- a/examples/example-pack-err/page.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[example]
-id = "example-pack-err"
-name = "Pack an Error"
-icon = "🛑"
-category = "macros"
-desc = """
-Demonstrates how to use the `pack_err!` macro to define error types with automatic `name` field (snake_case at compile time) and optional `info` field. Also shows `--json` serialization when `structural_renderer` is enabled.
-"""
-tags = ["pack_err!", "extras", "structural_renderer", "--json"]
-files = ["src/main.rs", "Cargo.toml"]