Bugs in fa version of document

[ashykng]

Describe the bug
The Persian version of the documentation has some errors:

1. some words or phrases weren't translated
2. the sponsors list wasn't shown in rtl style
3. dropdown-language has a bug in the rtl style
4. on the docs page Gold sponsors didn't show
5. on the docs page the theme slider has a bug
6. on the docs page next and prev buttons didn't have the prefix

Screenshots

Additional context
those bugs have been fixed

[ashykng]

@jasonsaayman
Hi please check those changes