add some properties to Timestamp (pandas-dev#46761)

Author: Dr-Irv

pandas/_libs/tslibs/timestamps.pyi

@@ -199,10 +199,14 @@ class Timestamp(datetime):
     @property
     def day_of_week(self) -> int: ...
     @property
+    def dayofweek(self) -> int: ...
+    @property
     def day_of_month(self) -> int: ...
     @property
     def day_of_year(self) -> int: ...
     @property
+    def dayofyear(self) -> int: ...
+    @property
     def quarter(self) -> int: ...
     @property
     def week(self) -> int: ...
@@ -211,3 +215,7 @@ class Timestamp(datetime):
     ) -> np.datetime64: ...
     @property
     def _date_repr(self) -> str: ...
+    @property
+    def days_in_month(self) -> int: ...
+    @property
+    def daysinmonth(self) -> int: ...