TYP: Update timestamps.pyi (#47756)

* TYP: Update timestamps.pyi

* make things type check

* add back _as_unit

* fix flake8

* more improvements

Author: hauntsaninja

pandas/_libs/tslibs/timestamps.pyi

@@ -85,10 +85,10 @@ class Timestamp(datetime):
     def fold(self) -> int: ...
     @classmethod
     def fromtimestamp(
-        cls: type[_DatetimeT], t: float, tz: _tzinfo | None = ...
+        cls: type[_DatetimeT], ts: float, tz: _tzinfo | None = ...
     ) -> _DatetimeT: ...
     @classmethod
-    def utcfromtimestamp(cls: type[_DatetimeT], t: float) -> _DatetimeT: ...
+    def utcfromtimestamp(cls: type[_DatetimeT], ts: float) -> _DatetimeT: ...
     @classmethod
     def today(cls: type[_DatetimeT], tz: _tzinfo | str | None = ...) -> _DatetimeT: ...
     @classmethod
@@ -118,19 +118,25 @@ class Timestamp(datetime):
     def date(self) -> _date: ...
     def time(self) -> _time: ...
     def timetz(self) -> _time: ...
-    def replace(
+    # LSP violation: nanosecond is not present in datetime.datetime.replace
+    # and has positional args following it
+    def replace(  # type: ignore[override]
         self: _DatetimeT,
-        year: int = ...,
-        month: int = ...,
-        day: int = ...,
-        hour: int = ...,
-        minute: int = ...,
-        second: int = ...,
-        microsecond: int = ...,
-        tzinfo: _tzinfo | None = ...,
-        fold: int = ...,
+        year: int | None = ...,
+        month: int | None = ...,
+        day: int | None = ...,
+        hour: int | None = ...,
+        minute: int | None = ...,
+        second: int | None = ...,
+        microsecond: int | None = ...,
+        nanosecond: int | None = ...,
+        tzinfo: _tzinfo | type[object] | None = ...,
+        fold: int | None = ...,
+    ) -> _DatetimeT: ...
+    # LSP violation: datetime.datetime.astimezone has a default value for tz
+    def astimezone(  # type: ignore[override]
+        self: _DatetimeT, tz: _tzinfo | None
     ) -> _DatetimeT: ...
-    def astimezone(self: _DatetimeT, tz: _tzinfo | None = ...) -> _DatetimeT: ...
     def ctime(self) -> str: ...
     def isoformat(self, sep: str = ..., timespec: str = ...) -> str: ...
     @classmethod
@@ -206,8 +212,6 @@ class Timestamp(datetime):
     @property
     def dayofweek(self) -> int: ...
     @property
-    def day_of_month(self) -> int: ...
-    @property
     def day_of_year(self) -> int: ...
     @property
     def dayofyear(self) -> int: ...