[Tests] add test coverage document for object reference class

[JckXia]

class	methods
ObjectReference
	ObjectReference()
Covered #212	ObjectReference(napi_env env, napi_ref ref)
	ObjectReference(Reference&& other)
	ObjectReference& operator =(Reference&& other)
	ObjectReference(ObjectReference&& other)
	ObjectReference& operator =(ObjectReference&& other)
	bool Set(const char* utf8name, napi_value value);
Covered	bool Set(const char* utf8name, Napi::Value value);
	bool Set(const char* utf8name, const char* utf8value);
	bool Set(const char* utf8name, bool boolValue);
	bool Set(const char* utf8name, double numberValue);
	bool Set(const std::string& utf8name, napi_value value);
Covered #212	bool Set(const std::string& utf8name, Napi::Value value);
	bool Set(const std::string& utf8name, std::string& utf8value);
	bool Set(const std::string& utf8name, bool boolValue);
	bool Set(const std::string& utf8name, double numberValue);
Covered #212	bool Set(uint32_t index, const napi_value value);
Covered #212	bool Set(uint32_t index, const Napi::Value value);
	bool Set(uint32_t index, const char* utf8value);
	bool Set(uint32_t index, const std::string& utf8value);
	bool Set(uint32_t index, bool boolValue);
	bool Set(uint32_t index, double numberValue);
	Napi::Value Get(const char* utf8name) const;
Covered #212	Napi::Value Get(const std::string& utf8name) const;
Covered #212	Napi::Value Get(uint32_t index) const;
Covered #212	ObjectReference Weak(Object value)
Covered #212	Object Reference Persistent(Object value)

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[JckXia]

Completed following landing of #1274