[needs: pm] Add the MV2 extension to NAVER Whale Store.

### Issue Details

I've learned about https://whale.naver.com/en/ and its extension store https://store.whale.naver.com/extensions/new this morning. NAVER is from what I can tell a reasonably large South Korean tech company.

Not a lot of non-South Korean extension makers have submitted their extensions there yet, so I think there's a decently large market for AdGuard MV2 Browser Extension to tap into.

I have indeed also been able to test its MV2 sideload support, which it indeed supports, with this screenshot as proof:

https://help.whale.naver.com/en/desktop/store/#i-5 imply that the submission process is not overly difficult, but NAVER is not doing themselves much favour by making the extension upload site at https://whale.dev/ Korean-language-only.

### Proposed solution

Add AdGuard MV2 Browser Extension to NAVER Whale Store.

### Alternative solution

None that I'm currently aware of.

(I'd put a veto on submitting AdGuard MV3 Browser Extension, at least to the extent the OP of an issue report would be in any sort of position to veto that).