add dhivehi language files

[siyamex]

Dhivehi translate files added

[tdonohue]

@siyamex : Thanks for this contribution! Just as a note, this appears to currently be failing our build process because the npm run lint command is throwing errors that say your dv.json5 file is incorrectly formatted.

I believe I've found the issue below (see my inline comment)

[tdonohue]

This line is missing the trailing comma (,). If you add a comma to the end of this line, that should fix the formatting errors.

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