Actually add fuzzy matcher

crates/gitnow/src/fuzzy_matcher.rs

@@ -0,0 +1,34 @@
+use nucleo_matcher::{pattern::Pattern, Matcher};
+
+use crate::app::App;
+
+pub struct FuzzyMatcher {}
+
+impl FuzzyMatcher {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub fn match_pattern<'a>(&self, pattern: &'a str, items: &'a [&'a str]) -> Vec<&'a str> {
+        let pat = Pattern::new(
+            &pattern,
+            nucleo_matcher::pattern::CaseMatching::Ignore,
+            nucleo_matcher::pattern::Normalization::Smart,
+            nucleo_matcher::pattern::AtomKind::Fuzzy,
+        );
+        let mut matcher = Matcher::new(nucleo_matcher::Config::DEFAULT);
+        let res = pat.match_list(items, &mut matcher);
+
+        res.into_iter().map(|((item, _))| *item).collect::<Vec<_>>()
+    }
+}
+
+pub trait FuzzyMatcherApp {
+    fn fuzzy_matcher(&self) -> FuzzyMatcher;
+}
+
+impl FuzzyMatcherApp for &'static App {
+    fn fuzzy_matcher(&self) -> FuzzyMatcher {
+        FuzzyMatcher::new()
+    }
+}