Add support for `docc` documentation in ProjectDescriptionHelpers (#5198)

Sources/TuistKit/ProjectEditor/ProjectEditor.swift

@@ -139,7 +139,10 @@ final class ProjectEditor: ProjectEditing {
         let dependenciesPath = manifestFilesLocator.locateDependencies(at: editingPath)
 
         let helpers = helpersDirectoryLocator.locate(at: editingPath).map {
-            FileHandler.shared.glob($0, glob: "**/*.swift")
+            [
+                FileHandler.shared.glob($0, glob: "**/*.swift"),
+                FileHandler.shared.glob($0, glob: "**/*.docc"),
+            ].flatMap { $0 }
         } ?? []
 
         let templates = templatesDirectoryLocator.locateUserTemplates(at: editingPath).map {

Tests/TuistKitTests/ProjectEditor/ProjectEditorTests.swift

@@ -85,7 +85,7 @@ final class ProjectEditorTests: TuistUnitTestCase {
         let graph = Graph.test(name: "Edit")
         let helpersDirectory = directory.appending(component: "ProjectDescriptionHelpers")
         try FileHandler.shared.createFolder(helpersDirectory)
-        let helpers = ["A.swift", "B.swift"].map { helpersDirectory.appending(component: $0) }
+        let helpers = ["A.swift", "B.swift", "Documentation.docc"].map { helpersDirectory.appending(component: $0) }
         try helpers.forEach { try FileHandler.shared.touch($0) }
         let manifests = [
             ManifestFilesLocator.ProjectManifest(

projects/tuist/fixtures/app_with_docc/Tuist/ProjectDescriptionHelpers/Documentation.docc/Documentation.md

@@ -0,0 +1,13 @@
+# ``ProjectDescriptionHelpers``
+
+<!--@START_MENU_TOKEN@-->Summary<!--@END_MENU_TOKEN@-->
+
+## Overview
+
+<!--@START_MENU_TOKEN@-->Text<!--@END_MENU_TOKEN@-->
+
+## Topics
+
+### <!--@START_MENU_TOKEN@-->Group<!--@END_MENU_TOKEN@-->
+
+- <!--@START_MENU_TOKEN@-->``Symbol``<!--@END_MENU_TOKEN@-->