refactor!: remove legacy parser feature and migrate to picker

The legacy `parser` feature and its module tree (`mingling::parser`,
`Argument`, `Picker`, `Pickable`, etc.) have been fully removed and
replaced by the `picker` feature powered by `arg-picker`.

BREAKING CHANGE: Remove `parser` feature and use `picker` instead.
Migration guide: Replace `features = ["parser"]` with
`features = ["picker"]` and update API usage per the provided table.

1 files changed, 6 insertions, 6 deletions

diff --git a/examples/example-structural-renderer/src/main.rs b/examples/example-structural-renderer/src/main.rs
index eca87fc..a1bddbd 100644
--- a/examples/example-structural-renderer/src/main.rs
+++ b/examples/example-structural-renderer/src/main.rs
@@ -17,8 +17,8 @@
 //! member_age: 22
 //! ```
 
-use mingling::prelude::*;
-use mingling::{parser::Picker, setup::StructuralRendererSetup, Grouped, StructuralData};
+use mingling::setup::picker::StructuralRendererSetup;
+use mingling::{Grouped, StructuralData, prelude::*};
 use serde::Serialize;
 use std::io::Write;
 
@@ -55,10 +55,10 @@ struct Info {
 
 #[chain]
 fn parse_render(prev: EntryRender) -> Next {
-    let (name, age) = Picker::new(prev.inner)
-        .pick::<String>(())
-        .pick::<i32>(())
-        .unpack();
+    let (name, age) = prev
+        .pick_or_default(&arg![String])
+        .pick_or_default(&arg![i32])
+        .unwrap();
     Info { name, age }.to_render()
 }