Refactor SwiftUI extension generation and generation SwiftUI extension for images

Sources/ResgenSwift/Generate/Model/ConfigurationFile.swift

@@ -102,6 +102,7 @@ struct ImagesConfiguration: Codable, CustomDebugStringConvertible {
     let xcassetsPath: String
     let extensionOutputPath: String
     let extensionName: String?
+    let extensionNameSwiftUI: String?
     let extensionSuffix: String?
     private let staticMembers: Bool?
     
@@ -119,6 +120,7 @@ struct ImagesConfiguration: Codable, CustomDebugStringConvertible {
             - Xcassets path: \(xcassetsPath)
             - Extension output path: \(extensionOutputPath)
             - Extension name: \(extensionName ?? "-")
+            - Extension name SwiftUI: \(extensionNameSwiftUI ?? "-")
             - Extension suffix: \(extensionSuffix ?? "-")
         """
     }

Sources/ResgenSwift/Generate/Runnable/ImagesConfiguration+ShellCommandable.swift

@@ -31,6 +31,12 @@ extension ImagesConfiguration: Runnable {
                 extensionName
             ]
         }
+        if let extensionNameSwiftUI = extensionNameSwiftUI {
+            args += [
+                "--extension-name-swift-ui",
+                extensionNameSwiftUI
+            ]
+        }
         if let extensionSuffix = extensionSuffix {
             args += [
                 "--extension-suffix",