Add gdb pretty printers

[UNEXPECTEDsemicolon]

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Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

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I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/

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1 out of 2 committers have signed the CLA.
✅ (UNEXPECTEDsemicolon)[https://github.com/UNEXPECTEDsemicolon]
❌ @maxim Belov
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_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}

[UNEXPECTEDsemicolon]

I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/