Uyghur(China) keyboard, dictionary added.

[neo-turak]

See the contributing readme for more detailed guideline, please understand and accept them: https://github.com/Helium314/HeliBoard/blob/main/CONTRIBUTING.md
tl;dr (you should still read the full list though):

• make sure it's wanted
• a single thing only
• describe it properly
• re-use existing mechanisms / code
• low performance impact
• make it a draft if you still want to work on it
• don't do translation PRs

Further

• When the PR contains "fixes" , the related issue will be linked and automatically closed if the PR is merged (also works for other words like "fix", "resolve", "resolves", "closes", ...)
• If you add a keyboard layout, make sure you have read https://github.com/Helium314/HeliBoard/blob/main/layouts.md#adding-new-layouts--languages
• Please avoid force-pushing when doing changes. This way it's not possible which parts have changed since the previous state.

[Helium314]

Please do not add dictionaries to this app, I do not accept additiond here to keep app size reasonable.
Dictionaries (with word list) can be added to the dictionaries repository.

Reading the layouts.md file as pointed out in the contribution guidelines would be helpful (e.g. regarding the script)

[Helium314]

Setting this to draft until necessary changes are done