update contest-token.txt

Запрос на слияние 'task' (#2) из task в master

update spec/codex.md

delete PRD.md

create spec/codex.md

create README.md

update spec/codex.md

delete PRD.md

create spec/codex.md

create README.md

create demo/verification.md

Запрос на слияние 'task' (#1) из task в master

create dev/solution.cs

update PRD.md

create PRD.md

docs: add contribution variant for branch refs/heads/task

update dev/solution.cs