[Yunq] Add a basic yunq test into libyunq.

lib/yunq/test/example/example.yunq.h

@@ -0,0 +1,43 @@
+// Generated file - DO NOT MODIFY
+#pragma once
+
+#include <glacier/buffer/byte_buffer.h>
+#include <glacier/buffer/cap_buffer.h>
+#include <glacier/status/status.h>
+#include <glacier/container/vector.h>
+#include <glacier/string/string.h>
+#include <yunq/message_view.h>
+#include <yunq/serialize.h>
+#include <ztypes.h>
+
+
+namespace ex {
+
+class Basic {
+ public:
+  Basic() {}
+  // Delete copy and move until implemented.
+  Basic(const Basic&) = delete;
+  Basic(Basic&&) = default;
+  Basic& operator=(Basic&&) = default;
+
+  [[nodiscard]] glcr::Status ParseFromBytes(const yunq::MessageView& message);
+  [[nodiscard]] glcr::Status ParseFromBytes(const yunq::MessageView& message, const glcr::CapBuffer&);
+  uint64_t SerializeToBytes(glcr::ByteBuffer&, uint64_t offset) const;
+  uint64_t SerializeToBytes(glcr::ByteBuffer&, uint64_t offset, glcr::CapBuffer&) const; 
+
+  const uint64_t& field() const { return field_; }
+  uint64_t& mutable_field() { return field_; }
+  void set_field(const uint64_t& value) { field_ = value; }
+
+ private:
+  uint64_t field_;
+
+  // Parses everything except for caps.
+  glcr::Status ParseFromBytesInternal(const yunq::MessageView& message);
+
+  uint64_t SerializeInternal(yunq::Serializer& serializer) const;
+};
+
+
+}  // namepace ex