Ethiopian calendar support: use period picker instead of date picker

[mestachs]

To avoid a lot of hassle, moving to a datepicker that already support different calendars help a lot.

I've modified the existing period picker (used in the contract modules for start and end period) to accept a new mode "active"
It will display the 2 years first, end users can still type (ex 201601 and will get Meskerem 2016 or January 2016)

Sample screenshot on gregorian calendar (before and after)

note

• that it fixes a weird issue where if you put 01/01/2023 you didn't get all the contracts...
• I've tried to support to parse the date format in the url so the page doesn't crash and still filter