Add Candidate type for case-insensitive completion, shopt_group macro, escape fixes, and vi mode tweaks

src/state.rs

@@ -31,7 +31,7 @@ use crate::{
   },
   prelude::*,
   readline::{
-    complete::{BashCompSpec, CompSpec},
+    complete::{BashCompSpec, Candidate, CompSpec},
     keys::KeyEvent,
     markers,
   },
@@ -1001,6 +1001,13 @@ impl From<Vec<String>> for Var {
   }
 }
 
+impl From<Vec<Candidate>> for Var {
+	fn from(value: Vec<Candidate>) -> Self {
+	  let as_strs = value.into_iter().map(|c| c.0).collect::<Vec<_>>();
+		Self::new(VarKind::Arr(as_strs.into()), VarFlags::NONE)
+	}
+}
+
 impl From<&[String]> for Var {
   fn from(value: &[String]) -> Self {
     let mut new = VecDeque::new();