Declarative providers (#5084)

Co-authored-by: Douwe Osinga <douwe@squareup.com>
Co-authored-by: Michael Neale <michael.neale@gmail.com>

crates/goose/src/providers/base.rs

@@ -81,6 +81,14 @@ impl ModelInfo {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, ToSchema)]
+pub enum ProviderType {
+    Preferred,
+    Builtin,
+    Declarative,
+    Custom,
+}
+
 /// Metadata about a provider's configuration requirements and capabilities
 #[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
 pub struct ProviderMetadata {
@@ -93,7 +101,6 @@ pub struct ProviderMetadata {
     /// The default/recommended model for this provider
     pub default_model: String,
     /// A list of currently known models with their capabilities
-    /// TODO: eventually query the apis directly
     pub known_models: Vec<ModelInfo>,
     /// Link to the docs where models can be found
     pub model_doc_link: String,
@@ -132,7 +139,6 @@ impl ProviderMetadata {
         }
     }
 
-    /// Create a new ProviderMetadata with ModelInfo objects that include cost data
     pub fn with_models(
         name: &str,
         display_name: &str,