File system endpoints redo (#15521)

* First stab at a massive remake of file system based endpoints

* Do not prefix system paths with directory separator char

* Ensure correct and consistent response types

* Fix partial view snippets endpoints

* Clean up IO (path) operations

* Update OpenAPI JSON to match new endpoints

* Return 201 when renaming file system resources

* Add "IsFolder" to file system item endpoints

* Replace "parentPath" with a "parent" object for file system creation endpoints

* Update OpenAPI JSON

* Rewrite snippets

* Regenerate OpenAPI JSON after forward merge

* Remove stylesheet overview endpoint

* Regenerate OpenAPI JSON after forward merge

* add server-file-system module to importmap

* Expose generated resource identifier in 201 responses

---------

Co-authored-by: Mads Rasmussen <madsr@hey.com>

src/Umbraco.Core/Models/FileSystem/FolderCreateModel.cs

@@ -0,0 +1,8 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public abstract class FolderCreateModel
+{
+    public required string Name { get; set; }
+
+    public string? ParentPath { get; set; }
+}

src/Umbraco.Core/Models/FileSystem/FolderModelBase.cs

@@ -0,0 +1,10 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public abstract class FolderModelBase
+{
+    public string Name { get; set; } = string.Empty;
+
+    public string Path { get; set; } = string.Empty;
+
+    public string? ParentPath { get; set; }
+}

src/Umbraco.Core/Models/FileSystem/PartialViewFolderCreateModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class PartialViewFolderCreateModel : FolderCreateModel
+{
+}

src/Umbraco.Core/Models/FileSystem/PartialViewFolderModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class PartialViewFolderModel : FolderModelBase
+{
+}

src/Umbraco.Core/Models/FileSystem/ScriptFolderCreateModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class ScriptFolderCreateModel : FolderCreateModel
+{
+}

src/Umbraco.Core/Models/FileSystem/ScriptFolderModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class ScriptFolderModel : FolderModelBase
+{
+}

src/Umbraco.Core/Models/FileSystem/StylesheetFolderCreateModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class StylesheetFolderCreateModel : FolderCreateModel
+{
+}

src/Umbraco.Core/Models/FileSystem/StylesheetFolderModel.cs

@@ -0,0 +1,5 @@
+namespace Umbraco.Cms.Core.Models.FileSystem;
+
+public class StylesheetFolderModel : FolderModelBase
+{
+}