ADD recognize weeks

[allanlaal]

examples:

week nr 23
wk 23
week №23
week # 23
W23
2022#23
first day 9 AM of 2022#23
week number 23
first day 9 AM of 2022 week number 23
2022 week 23 first day 9 AM
2022 week nr 23
2022W23 // ISO format

[kylekatarnls]

For the record, ISO format is already supported by PHP DateTime so both Carbon and JenssegersDate inherit it:

new \DateTime('2022W23')
new \Carbon\Carbon('2022W23')
new \Jenssegers\Date\Date('2022W23')

Maybe some other syntax are also natively supported this way.

[allanlaal]

upstream: briannesbitt/Carbon#2617

but detecting "week" and its formats is a heavily localized thing

[allanlaal]

upstream said no, so this has to be completed here