Refactor RazorpayClient to use actor model and remove documentation e…

…xclusion

- Changed `RazorpayClient` from a class to an actor for improved concurrency handling.
- Removed exclusion of `Documentation.docc` from the package configuration.

Package.swift

@@ -20,7 +20,6 @@ let package = Package(
             dependencies: [
                 .product(name: "AsyncHTTPClient", package: "async-http-client")
             ],
-            exclude: ["Documentation.docc"],
             swiftSettings: swiftSettings
         ),
         .testTarget(
@@ -37,4 +36,4 @@ var swiftSettings: [SwiftSetting] {
         .enableUpcomingFeature("ExistentialAny"),
         .enableUpcomingFeature("FullTypedThrows"),
     ] 
-}
+}

Sources/RazorpayKit/RazorpayClient.swift

@@ -47,7 +47,7 @@ import AsyncHTTPClient
 /// - ``iin``
 /// - ``qrCode``
 /// - ``webhook``
-public final class RazorpayClient {
+public actor RazorpayClient {
 
     /// Routes for managing Razorpay accounts
     public var account: RazorpayAccountRoutes