improve load_park command

allow to specify park via absolute path
make .sv6 filename extension optional
support .sc6 filename extension, but default to .sv6

src/openrct2/interface/InteractiveConsole.cpp

@@ -1319,14 +1319,28 @@ static int32_t cc_for_date([[maybe_unused]] InteractiveConsole& console, [[maybe
 
 static int32_t cc_load_park([[maybe_unused]] InteractiveConsole& console, [[maybe_unused]] const arguments_t& argv)
 {
-    if (argv.size() > 0)
+    if (argv.size() < 1)
+    {
+        console.WriteFormatLine("Parameters required <filename>");
+        return 0;
+    }
+
+    char savePath[MAX_PATH];
+    if (String::IndexOf(argv[0].c_str(), '/') == SIZE_MAX && String::IndexOf(argv[0].c_str(), '\\') == SIZE_MAX)
     {
-        char savePath[MAX_PATH];
+        // no / or \ was included. File should be in save dir.
         platform_get_user_directory(savePath, "save", sizeof(savePath));
         safe_strcat_path(savePath, argv[0].c_str(), sizeof(savePath));
+    }
+    else
+    {
+        safe_strcpy(savePath, argv[0].c_str(), sizeof(savePath));
+    }
+    if (!String::EndsWith(savePath, ".sv6", true) && !String::EndsWith(savePath, ".sc6", true))
+    {
         path_append_extension(savePath, ".sv6", sizeof(savePath));
-        context_load_park_from_file(savePath);
     }
+    context_load_park_from_file(savePath);
     return 1;
 }
 
@@ -1701,7 +1715,7 @@ static constexpr const console_command console_command_table[] = {
                                     "Loading a scenery group will not load its associated objects.\n"
                                     "This is a safer method opposed to \"open object_selection\".",
                                     "load_object <objectfilenodat>" },
-    { "load_park", cc_load_park, "Load park from save directory with load_park parkname", "load_park <name>" },
+    { "load_park", cc_load_park, "Load park from save directory or by absolute path", "load_park <filename>" },
     { "object_count", cc_object_count, "Shows the number of objects of each type in the scenario.", "object_count" },
     { "open", cc_open, "Opens the window with the give name.", "open <window>." },
     { "quit", cc_close, "Closes the console.", "quit" },