Complete Russian translation of WebGL2 Fundamentals lessons and remove Q&A translations

[vicimpa]

This PR completes the Russian translation of the WebGL2 Fundamentals lessons and removes the Q&A section translations to maintain consistency with the original content structure.

[greggman]

I am right in guessing you used some LLM for this? If so, can I ask which one? And what your prompts were? Maybe we could do the same for other languages.

[vicimpa]

I used cursor. I struggled for a long time to make it work properly. It worked only through an intermediate translation state in the file. I can try it to add other languages, but it will take time, which is not much, considering that I have a lot of WebGL tasks)

[greggman]

I didn't mean to suggest you should personally do more translations. Rather, I was hoping you could share your prompts and steps.

[vicimpa]

I prepared detailed instructions in a file and created a table with file statuses and repeatedly asked Cursor to follow the task by file. So I managed to make something like a state machine for a large task. It is long and tedious. Especially considering that some articles are very large. We should somehow come up with a way to divide large articles into small parts, then there will be no problems with translation and it can be automated.