Add option for gslides markdown parser to raise on unsupported elements#54

ZmeiGorynych merged 3 commits intomainMotleyAI/gslides-api:mainfrom

egor/dev-1067-add-option-for-gslides-markdown-parser-to-raise-onMotleyAI/gslides-api:egor/dev-1067-add-option-for-gslides-markdown-parser-to-raise-onCopy head branch name to clipboard