fix: some more things

Author: AtharvaVaidya

Sources/CompilerSwiftAI/Function Calling/CompilerClient+Functions.swift

@@ -16,7 +16,7 @@ public extension CompilerClient {
     ///   - state: Current state of your app (as defined by the developer, only needs to conform to Encodable and Sendable)
     ///   - token: Authorization token
     /// - Returns: An array of functions with Parameters that are both Decodable and Sendable
-    func processFunction<State: AppStateProtocol, FunctionType: FunctionCallProtocol>(
+    func processFunction<State: AppStateProtocol, FunctionType: Decodable & Sendable>(
         prompt: String,
         for state: State
     ) async throws -> [FunctionType] {

Sources/CompilerSwiftAI/Function Calling/Function.swift

@@ -2,6 +2,12 @@
 
 /// The Function struct hold's the function call being returned from Compiler with parameters defined by in the applcation
 public struct Function<Parameters: Decodable & Sendable>: FunctionCallProtocol {
+    private enum CodingKeys: String, CodingKey {
+        case id = "function"
+        case parameters
+        case colloquialDescription = "colloquial_response"
+    }
+    
     /// Function name
     public let id: String
 
@@ -10,10 +16,10 @@ public struct Function<Parameters: Decodable & Sendable>: FunctionCallProtocol {
 
     /// The description to show the user while this function is being executed.
     public let colloquialDescription: String
-
-    private enum CodingKeys: String, CodingKey {
-        case id = "function"
-        case parameters
-        case colloquialDescription = "colloquial_response"
+    
+    public init(id: String, parameters: Parameters?, colloquialDescription: String) {
+        self.id = id
+        self.parameters = parameters
+        self.colloquialDescription = colloquialDescription
     }
 }