chore: add Borrow impl for Extra and NormalizedPackageName (#89)

This allows these types to be used in HashMaps which can be queried by
string.

I didnt implement it for `PackageName` because the hash of `PackageName`
is not equal to the hash of `String`.

crates/rattler_installs_packages/src/extra.rs

@@ -31,6 +31,7 @@
 use miette::Diagnostic;
 use serde::{Serialize, Serializer};
 use serde_with::DeserializeFromStr;
+use std::borrow::Borrow;
 use std::cmp::Ordering;
 use std::hash::{Hash, Hasher};
 use std::str::FromStr;
@@ -110,3 +111,9 @@ impl Serialize for Extra {
         self.source.as_ref().serialize(serializer)
     }
 }
+
+impl Borrow<str> for Extra {
+    fn borrow(&self) -> &str {
+        self.normalized.as_ref()
+    }
+}

crates/rattler_installs_packages/src/package_name.rs

@@ -2,6 +2,7 @@ use miette::Diagnostic;
 use regex::Regex;
 use serde::{Serialize, Serializer};
 use serde_with::{DeserializeFromStr, SerializeDisplay};
+use std::borrow::Borrow;
 use std::cmp::Ordering;
 use std::fmt::{Display, Formatter};
 use std::hash::{Hash, Hasher};
@@ -145,6 +146,12 @@ impl FromStr for NormalizedPackageName {
     }
 }
 
+impl Borrow<str> for NormalizedPackageName {
+    fn borrow(&self) -> &str {
+        self.0.as_ref()
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;