chore: add missing docs lint and document public API

Add `#![deny(missing_docs)]` across multiple crates and fill in
documentation for all public items, including struct fields, enum
variants, trait methods, and proc macros.  Also mark two shell scripts
as executable.

1 files changed, 1 insertions, 0 deletions

diff --git a/arg_picker/src/value/vec_until.rs b/arg_picker/src/value/vec_until.rs
index 1b79641..04d87ce 100644
--- a/arg_picker/src/value/vec_until.rs
+++ b/arg_picker/src/value/vec_until.rs
@@ -21,6 +21,7 @@ pub struct VecUntil<T> {
 }
 
 impl<T> VecUntil<T> {
+    /// Consumes `self` and returns the underlying [`Vec<T>`].
     pub fn into_inner(self) -> Vec<T> {
         self.inner
     }