Ensure backend key values are sorted

Go map key iteration is (intentionally) random, so we need to sort these
to get consistent help messages and (more importantly) consistent docs.

Signed-off-by: Jacob Howard <[email protected]>

Author: xenoscopic

commands/backend.go

@@ -37,5 +37,7 @@ func ensureAPIKey(backend string) (string, error) {
 }
 
 func ValidBackendsKeys() string {
-	return strings.Join(slices.Collect(maps.Keys(ValidBackends)), ", ")
+	keys := slices.Collect(maps.Keys(ValidBackends))
+	slices.Sort(keys)
+	return strings.Join(keys, ", ")
 }

docs/reference/docker_model_list.yaml

@@ -8,7 +8,7 @@ plink: docker_model.yaml
 options:
     - option: backend
       value_type: string
-      description: Specify the backend to use (openai, llama.cpp)
+      description: Specify the backend to use (llama.cpp, openai)
       deprecated: false
       hidden: true
       experimental: false