Introducing Orca Cloud: https://cloud.orcaslicer.com (#13414)

* Add OrcaCloud sync platform and preset bundle sharing system

  Introduce OrcaCloud, a cloud sync platform for user presets, alongside
  a preset bundle system that enables sharing printer/filament/process
  profiles as local exportable bundles or subscribed cloud bundles.

  OrcaCloud platform:
  - Auth to Orca Cloud
  - Encrypted token storage (file-based or system keychain)
  - User preset sync with
  - Profile migration from default/bambu folders on first login
  - Homepage integration with entrance to cloud.orcaslicer.com

  Preset bundles:
  - Local bundle import/export with bundle_structure.json metadata
  - Subscribed cloud bundles with version-based update checking
  - Thread-safe concurrent bundle access with read-write mutex
  - Canonical bundle preset naming (_local/<id>/... and _subscribed/<id>/...)
  - Bundle presets are read-only; grouped under subheaders in combo boxes
  - PresetBundleDialog with auto-sync toggle, refresh, update notifications
  - Hyperlinked bundle names to cloud bundle pages

  Co-authored-by: Sabriel Koh <sabrielkcr@gmail.com>
  Co-authored-by: Derrick <derrick992110@gmail.com>
  Co-authored-by: Mykola Nahirnyi <mnahirnyi@amcbridge.com>
  Co-authored-by: Ian Chua <iancrb00@gmail.com>
  Co-authored-by: Draginraptor <draginraptor@gmail.com>
  Co-authored-by: ExPikaPaka <112851715+ExPikaPaka@users.noreply.github.com>
  Co-authored-by: Ian Bassi <ian.bassi@outlook.com>
  Co-authored-by: Ocraftyone <Ocraftyone@users.noreply.github.com>
  Co-authored-by: yw4z <ywsyildiz@gmail.com>
  Co-authored-by: peterm-m <101202951+peterm-m@users.noreply.github.com>

* Fixed an issue on Windows it failed to login Orca Cloud with Google account

src/slic3r/GUI/GUI.cpp

@@ -1,5 +1,6 @@
 #include "GUI.hpp"
 #include "GUI_App.hpp"
+#include "ICloudServiceAgent.hpp"
 #include "format.hpp"
 #include "I18N.hpp"
 
@@ -524,15 +525,6 @@ void about()
     dlg.ShowModal();
 }
 
-void login()
-{
-	//LoginDialog dlg;
-	//dlg.ShowModal();
-
-	ZUserLogin dlg;
-    dlg.run();
-}
-
 void desktop_open_datadir_folder()
 {
 	// Execute command to open a file explorer, platform dependent.