Support "game count" and v4 objects (#140)

* generate object, but not supported in linker yet

* add link and tests

* update types

decompiler/data/game_count.cpp

@@ -0,0 +1,40 @@
+#include "third-party/fmt/core.h"
+#include "decompiler/ObjectFile/ObjectFileDB.h"
+#include "game_count.h"
+#include "LinkedWordReader.h"
+
+GameCountResult process_game_count(ObjectFileData& data) {
+  GameCountResult result;
+  auto& words = data.linked_data.words_by_seg.at(0);
+  auto reader = LinkedWordReader(&words);
+  auto type = reader.get_type_tag();
+  assert(type == "game-count-info");
+  auto length = reader.get_word<s32>();
+
+  for (s32 i = 0; i < length; i++) {
+    GameCountResult::CountInfo info;
+    info.money_count = reader.get_word<s32>();
+    info.buzzer_count = reader.get_word<s32>();
+    result.info.push_back(info);
+  }
+
+  result.mystery_data[0] = reader.get_word<u32>();
+  result.mystery_data[1] = reader.get_word<u32>();
+  assert(reader.words_left() == 0);
+  return result;
+}
+
+std::string write_game_count(const GameCountResult& result) {
+  std::string str;
+  str +=
+      ";; this file contains money/buzzer counts for each level.\n;; The last pair is unknown data "
+      "and possibly a bug that it is included\n\n";
+
+  for (auto& x : result.info) {
+    str += fmt::format("(:money {} :buzzer {})\n", x.money_count, x.buzzer_count);
+  }
+
+  str += fmt::format("(:unknown-1 {} :unknown-2 {})\n", result.mystery_data[0],
+                     result.mystery_data[1]);
+  return str;
+}