Update LocalInference to use public repos

llama_stack/providers/impls/ios/inference/LocalInferenceImpl/PromptTemplate.swift

@@ -0,0 +1,12 @@
+import Foundation
+import Stencil
+
+public struct PromptTemplate {
+    let template: String
+    let data: [String: Any]
+
+  public func render() throws -> String {
+    let template = Template(templateString: self.template)
+    return try template.render(self.data)
+  }
+}