feat: Added proper Markdown renderer (#2415)

plugins/ui/include/ui/markdown.hpp

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <hex.hpp>
+
+#include <imgui.h>
+#include <hex/ui/imgui_imhex_extensions.h>
+
+#include <string>
+#include <future>
+#include <map>
+
+#include <md4c.h>
+
+#include <wolv/container/lazy.hpp>
+#include <romfs/romfs.hpp>
+
+namespace hex::ui {
+
+    class Markdown {
+    public:
+        Markdown() = default;
+        Markdown(const std::string &text);
+
+        void draw();
+        void reset();
+
+        void setRomfsTextureLookupFunction(std::function<wolv::container::Lazy<ImGuiExt::Texture>(const std::string &)> romfsFileReader) {
+            m_romfsFileReader = std::move(romfsFileReader);
+        }
+
+    private:
+        bool inTable() const;
+        std::string getElementId();
+
+    private:
+        std::string m_text;
+        bool m_initialized = false;
+        MD_RENDERER m_mdRenderer;
+        bool m_firstLine = true;
+        u32 m_elementId = 1;
+        std::string m_currentLink;
+        bool m_drawingImageAltText = false;
+        u32 m_listIndent = 0;
+        std::vector<u8> m_tableVisibleStack;
+
+        std::map<u32, std::future<wolv::container::Lazy<ImGuiExt::Texture>>> m_futureImages;
+        std::map<u32, ImGuiExt::Texture> m_images;
+        std::function<wolv::container::Lazy<ImGuiExt::Texture>(const std::string &)> m_romfsFileReader;
+
+        std::vector<ImVec2> m_quoteStarts;
+        std::vector<u8> m_quoteNeedsChildEnd;
+        bool m_quoteStart = false;
+    };
+
+}