Add Khasi language (kha) to language-data

[aanzx]

Add Khasi to data/langdb.yaml and data/language-data.json

Phabricator task: https://phabricator.wikimedia.org/T427917

[srish]

@aanzx Thanks for the PR! Wanted to make sure you followed instructions in https://www.mediawiki.org/wiki/Manual:Adding_and_removing_languages#language-data to add the data. This would require running the script src/util/ulsdata2json.php before and after adding changes to data/langdb.yaml.

[srish]

Although, for adding a language to this repo, it is not necessary, it would still be helpful to point to any discussion elsewhere on the wikis or link it with the Phabricator task.

[aanzx]

@aanzx Thanks for the PR! Wanted to make sure you followed instructions in https://www.mediawiki.org/wiki/Manual:Adding_and_removing_languages#language-data to add the data. This would require running the script src/util/ulsdata2json.php before and after adding changes to data/langdb.yaml.

done

[aanzx]

Although, for adding a language to this repo, it is not necessary, it would still be helpful to point to any discussion elsewhere on the wikis or link it with the Phabricator task.

i will reason for adding Khasi on phabricator task soon