types.jl: sleep with Date.Period types

Supports sleep(Dates.Second(10))
		 sleep(Dates.Milliesecond(10))

Closes #19736

Author: Shade5

base/dates/types.jl

@@ -241,3 +241,7 @@ Base.isless(x::Date,y::Date) = isless(value(x),value(y))
 Base.isless(x::DateTime,y::DateTime) = isless(value(x),value(y))
 Base.isless(x::TimeType,y::TimeType) = isless(promote(x,y)...)
 ==(x::TimeType,y::TimeType) = ===(promote(x,y)...)
+
+import Base: sleep
+sleep(sec::Base.Dates.Second) = sleep(sec.value)
+sleep(sec::Base.Dates.Millisecond) = sleep(sec.value*0.001)