Accept either strings or structs for hosts (#6763)

## Summary

Technically a struct did work in the last release, so let's not break
it.

crates/uv-configuration/src/trusted_host.rs

@@ -1,3 +1,5 @@
+use std::str::FromStr;
+
 use url::Url;
 
 /// A trusted host, which could be a host or a host-port pair.
@@ -31,13 +33,28 @@ impl TrustedHost {
     }
 }
 
+#[derive(serde::Deserialize)]
+#[serde(untagged)]
+enum TrustHostWire {
+    String(String),
+    Struct {
+        scheme: Option<String>,
+        host: String,
+        port: Option<u16>,
+    },
+}
+
 impl<'de> serde::de::Deserialize<'de> for TrustedHost {
     fn deserialize<D>(deserializer: D) -> Result<TrustedHost, D::Error>
     where
         D: serde::de::Deserializer<'de>,
     {
-        let s = String::deserialize(deserializer)?;
-        s.parse().map_err(serde::de::Error::custom)
+        let helper = TrustHostWire::deserialize(deserializer)?;
+
+        match helper {
+            TrustHostWire::String(s) => TrustedHost::from_str(&s).map_err(serde::de::Error::custom),
+            TrustHostWire::Struct { scheme, host, port } => Ok(TrustedHost { scheme, host, port }),
+        }
     }
 }
 

crates/uv/tests/show_settings.rs

@@ -3419,7 +3419,7 @@ fn allow_insecure_host() -> anyhow::Result<()> {
 
     let config = context.temp_dir.child("uv.toml");
     config.write_str(indoc::indoc! {r#"
-        allow-insecure-host = ["google.com"]
+        allow-insecure-host = ["google.com", { host = "example.com" }]
     "#})?;
 
     let requirements_in = context.temp_dir.child("requirements.in");
@@ -3495,6 +3495,11 @@ fn allow_insecure_host() -> anyhow::Result<()> {
                     host: "google.com",
                     port: None,
                 },
+                TrustedHost {
+                    scheme: None,
+                    host: "example.com",
+                    port: None,
+                },
             ],
             no_build_isolation: false,
             no_build_isolation_package: [],