add language filter

[alikon]

Pull Request for Issue # .

Summary of Changes

added language filter

Testing Instructions

JROOT_URL/api/index.php/v1/content/article?filter[language]=de-DE

Expected result

filter by language

Actual result

Documentation Changes Required

[wilsonge]

So I'd deliberately left this one out because it's not the primary attribute of the Resource and I wasn't sure if it should be (i.e. we should filter on the content type primary key as opposed to language code)

[alikon]

i was testing on a multiligual so i've thinked at it like a missed option.... but yeah let's focus on porting filter on all the core component before

[wilsonge]

It's definitely missing and needs to be there before stable. but probably needs a proper discussion

[alikon]

ok i'll do a new pr

[wilsonge]

thankyou :)