Added Google Search support

Sources/GoogleAI/FunctionCalling.swift

@@ -164,6 +164,9 @@ public struct Tool {
   /// Enables the model to execute code as part of generation.
   let codeExecution: CodeExecution?
 
+  /// Enables the Google Search
+  let googleSearch: GoogleSearch?
+
   /// Constructs a new `Tool`.
   ///
   /// - Parameters:
@@ -176,10 +179,13 @@ public struct Tool {
   ///   ``FunctionResponse`` in ``ModelContent/Part/functionResponse(_:)`` with the
   ///   ``ModelContent/role`` "function", providing generation context for the next model turn.
   ///   - codeExecution: Enables the model to execute code as part of generation, if provided.
+  ///   - googleSearch: Enables the Google Search.
   public init(functionDeclarations: [FunctionDeclaration]? = nil,
-              codeExecution: CodeExecution? = nil) {
+              codeExecution: CodeExecution? = nil,
+              googleSearch: GoogleSearch? = nil) {
     self.functionDeclarations = functionDeclarations
     self.codeExecution = codeExecution
+    self.googleSearch = googleSearch
   }
 }
 
@@ -259,6 +265,12 @@ public struct CodeExecution {
   public init() {}
 }
 
+/// Tool for grounding with Google Search
+public struct GoogleSearch {
+  /// Constructs a new `GoogleSearch` tool.
+  public init() {}
+}
+
 /// Code generated by the model that is meant to be executed, and the result returned to the model.
 ///
 /// Only generated when using the ``CodeExecution`` tool, in which case the code will automatically
@@ -351,6 +363,8 @@ extension FunctionResponse: Encodable {}
 
 extension CodeExecution: Encodable {}
 
+extension GoogleSearch: Encodable {}
+
 extension ExecutableCode: Codable {}
 
 @available(iOS 15.0, macOS 11.0, macCatalyst 15.0, *)