feat: Added a theme manager view to make it easier to make new themes

plugins/builtin/include/content/views/view_theme_manager.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <hex.hpp>
+
+#include <hex/api/content_registry.hpp>
+#include <hex/ui/view.hpp>
+
+#include <array>
+#include <string>
+
+namespace hex::plugin::builtin {
+
+    class ViewThemeManager : public View {
+    public:
+        ViewThemeManager();
+        ~ViewThemeManager() override = default;
+
+        void drawContent() override;
+
+        [[nodiscard]] bool isAvailable() const override { return true; }
+        [[nodiscard]] bool hasViewMenuItemEntry() const override { return false; }
+
+    private:
+        std::string m_themeName;
+        bool m_viewOpen = false;
+    };
+
+}