[Tolk] Migration from FunC #1039
Description
Let's migrate the short and longer articles that show how to migrate from FunC to Tolk from the old docs:
- https://docs.ton.org/v3/documentation/smart-contracts/tolk/tolk-vs-func/in-short
- https://docs.ton.org/v3/documentation/smart-contracts/tolk/tolk-vs-func/in-detail
- https://docs.ton.org/v3/documentation/smart-contracts/tolk/tolk-vs-func/mutability
- https://docs.ton.org/v3/documentation/smart-contracts/tolk/tolk-vs-func/stdlib
Let's not change anything, except remove marketing language, spelling and grammar fixes, and personal language to make the guides adhere to the style of the new documentation.
We should either combine all those articles into one large article or create a group.