Improve bookmark API

plugins/libimhex/include/hex/api/content_registry.hpp

@@ -22,8 +22,7 @@ namespace hex {
         It allows you to add/register new content that will be picked up and used by the ImHex core or by other
         plugins when needed.
     */
-    class ContentRegistry {
-    public:
+    struct ContentRegistry {
         ContentRegistry() = delete;
 
         /* Settings Registry. Allows adding of new entries into the ImHex preferences window. */

plugins/libimhex/include/hex/api/imhex_api.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <hex.hpp>
+#include <hex/helpers/utils.hpp>
+
+#include <list>
+
+namespace hex {
+
+    struct ImHexApi {
+        ImHexApi() = delete;
+
+        struct Bookmarks {
+            Bookmarks() = delete;
+
+            struct Entry {
+                Region region;
+
+                std::vector<char> name;
+                std::vector<char> comment;
+                u32 color;
+            };
+
+            static void add(Region region, std::string_view name, std::string_view comment, u32 color = 0x00000000);
+            static void add(u64 addr, size_t size, std::string_view name, std::string_view comment, u32 color = 0x00000000);
+
+            static std::list<Entry>& getEntries();
+        };
+    };
+
+}