Add Urdu translations (#867)

### Prerequisites

Put an `x` into the box(es) that apply:

- [ ] This pull request fixes a bug.
- [x] This pull request adds a feature.
- [ ] This pull request introduces breaking change.

### Description

This commit adds urdu translations. 

Urdu uses the [Nastaliq](https://en.wikipedia.org/wiki/Nastaliq) script,
read from right to left. This script's unique style will often require
custom CSS. Because of these reasons, english text does not mix very
well with urdu. I felt it important to translate as much as possible
into Urdu for a better look and feel. For example, instead of 'Powered
By' in English, using the Urdu word for 'Thanks' was chosen as a
complete translation into Urdu might not work well due to differences in
subject-verb order

### Issues Resolved

List any existing issues this pull request resolves.

### Checklist

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#### General

- [x] Describe what changes are being made
- [x] Explain why and how the changes were necessary and implemented
respectively
- [ ] Reference issue with `#<ISSUE_NO>` if applicable

#### Resources

- [ ] If you have changed any SCSS code, run `make release` to
regenerate all CSS files

#### Contributors

- [x] Add yourself to `CONTRIBUTORS.md` if you aren't on it already

Co-authored-by: Muqeet Malik <muqeet.malik.-nd@disneystreaming.com>