impr: Vastly improved 3D Visualizer (#1456)

Based entirely on @paxcut's amazing PR #1443

---------

Co-authored-by: paxcut <paxcut@outlook.com>
Co-authored-by: paxcut <53811119+paxcut@users.noreply.github.com>

plugins/builtin/source/content/pl_visualizers/hex_viewer.cpp

@@ -0,0 +1,43 @@
+#include <hex/helpers/utils.hpp>
+
+#include <content/pl_visualizers/visualizer_helpers.hpp>
+
+#include <imgui.h>
+
+#include <hex/ui/imgui_imhex_extensions.h>
+#include <ui/hex_editor.hpp>
+#include <content/providers/memory_file_provider.hpp>
+
+namespace hex::plugin::builtin {
+
+    void drawHexVisualizer(pl::ptrn::Pattern &, pl::ptrn::IIterable &, bool shouldReset, std::span<const pl::core::Token::Literal> arguments) {
+        static ui::HexEditor editor;
+        static std::unique_ptr<MemoryFileProvider> dataProvider;
+
+        if (shouldReset) {
+            auto pattern = arguments[0].toPattern();
+            std::vector<u8> data;
+
+            dataProvider = std::make_unique<MemoryFileProvider>();
+            try {
+                data = pattern->getBytes();
+            } catch (const std::exception &) {
+                dataProvider->resize(0);
+                throw;
+            }
+
+            dataProvider->resize(data.size());
+            dataProvider->writeRaw(0x00, data.data(), data.size());
+            dataProvider->setReadOnly(true);
+
+            editor.setProvider(dataProvider.get());
+        }
+
+        if (ImGui::BeginChild("##editor", scaled(ImVec2(600, 400)), false, ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse)) {
+            editor.draw();
+
+            ImGui::EndChild();
+        }
+    }
+
+}