Add SwiftLint HARD rules

Sources/ResgenSwift/Images/ImagesError.swift

@@ -1,6 +1,6 @@
 //
 //  ImagesError.swift
-//  
+//
 //
 //  Created by Thibaut Schmitt on 24/01/2022.
 //
@@ -8,6 +8,7 @@
 import Foundation
 
 enum ImagesError: Error {
+
     case extensionNamesCollision(String)
     case inputFolderNotFound(String)
     case fileNotExists(String)
@@ -17,33 +18,33 @@ enum ImagesError: Error {
     case writeFile(String, String)
     case createAssetFolder(String)
     case unknown(String)
-    
+
     var description: String {
         switch self {
         case .extensionNamesCollision(let extensionName):
             return "error: [\(Fonts.toolName)] Error on extension names, extension name and SwiftUI extension name should be different (\(extensionName) is used on both)"
-            
+
         case .inputFolderNotFound(let inputFolder):
             return "error: [\(Images.toolName)] Input folder not found: \(inputFolder)"
-            
+
         case .fileNotExists(let filename):
             return "error: [\(Images.toolName)] File \(filename) does not exists"
-            
+
         case .unknownImageExtension(let filename):
             return "error: [\(Images.toolName)] File \(filename) have an unhandled file extension. Cannot generate image."
-            
-        case .getFileAttributed(let filename, let errorDescription):
+
+        case let .getFileAttributed(filename, errorDescription):
             return "error: [\(Images.toolName)] Getting file attributes of \(filename) failed with error: \(errorDescription)"
-            
+
         case .rsvgConvertNotFound:
             return "error: [\(Images.toolName)] Can't find rsvg-convert (can be installed with 'brew remove imagemagick && brew install librsvg')"
-            
-        case .writeFile(let subErrorDescription, let filename):
+
+        case let .writeFile(subErrorDescription, filename):
             return "error: [\(Images.toolName)] An error occured while writing content to \(filename): \(subErrorDescription)"
 
         case .createAssetFolder(let folder):
             return "error: [\(Colors.toolName)] An error occured while creating folder `\(folder)`"
-            
+
         case .unknown(let errorDescription):
             return "error: [\(Images.toolName)] Unknown error: \(errorDescription)"
         }