refactor: put resource downloading classes in common namespace

Puts them all inside the 'ResourceDownload' namespace, so that it's a
bit clearer from the outside that those belong to the same 'module'.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/dialogs/ModDownloadDialog.cpp

@@ -24,6 +24,8 @@
 #include "ui/pages/modplatform/flame/FlameResourcePages.h"
 #include "ui/pages/modplatform/modrinth/ModrinthResourcePages.h"
 
+namespace ResourceDownload {
+
 ModDownloadDialog::ModDownloadDialog(QWidget* parent, const std::shared_ptr<ModFolderModel>& mods, BaseInstance* instance)
     : ResourceDownloadDialog(parent, mods), m_instance(instance)
 {
@@ -57,3 +59,5 @@ QList<BasePage*> ModDownloadDialog::getPages()
 
     return pages;
 }
+
+}  // namespace ResourceDownload

launcher/ui/dialogs/ModDownloadDialog.h

@@ -25,8 +25,9 @@
 
 class QDialogButtonBox;
 
-class ModDownloadDialog final : public ResourceDownloadDialog
-{
+namespace ResourceDownload {
+
+class ModDownloadDialog final : public ResourceDownloadDialog {
     Q_OBJECT
 
    public:
@@ -45,3 +46,5 @@ class ModDownloadDialog final : public ResourceDownloadDialog
    private:
     BaseInstance* m_instance;
 };
+
+}  // namespace ResourceDownload

launcher/ui/dialogs/ResourceDownloadDialog.cpp

@@ -9,6 +9,8 @@
 #include "ui/pages/modplatform/ResourcePage.h"
 #include "ui/widgets/PageContainer.h"
 
+namespace ResourceDownload {
+
 ResourceDownloadDialog::ResourceDownloadDialog(QWidget* parent, const std::shared_ptr<ResourceFolderModel> base_model)
     : QDialog(parent), m_base_model(base_model), m_buttons(QDialogButtonBox::Help | QDialogButtonBox::Ok | QDialogButtonBox::Cancel), m_vertical_layout(this)
 {
@@ -150,3 +152,5 @@ void ResourceDownloadDialog::selectedPageChanged(BasePage* previous, BasePage* s
     // Same effect as having a global search bar
     m_selectedPage->setSearchTerm(prev_page->getSearchTerm());
 }
+
+}  // namespace ResourceDownload

launcher/ui/dialogs/ResourceDownloadDialog.h

@@ -7,12 +7,15 @@
 #include "ui/pages/BasePageProvider.h"
 
 class ResourceDownloadTask;
-class ResourcePage;
 class ResourceFolderModel;
 class PageContainer;
 class QVBoxLayout;
 class QDialogButtonBox;
 
+namespace ResourceDownload {
+
+class ResourcePage;
+
 class ResourceDownloadDialog : public QDialog, public BasePageProvider {
     Q_OBJECT
 
@@ -53,3 +56,5 @@ class ResourceDownloadDialog : public QDialog, public BasePageProvider {
 
     QHash<QString, ResourceDownloadTask*> m_selected;
 };
+
+}  // namespace ResourceDownload