I am developing a BEP20 token. The employer wants this token to be swappable in PancakeSwap.

When I read source of similar tokens, they add IUniswapV2Pair, IUniswapV2Router01 and IUniswapV2Router02 interfaces, but I can't find a guide that shows how to use this interfaces in the token contract source.

Is it necessary to use these interfaces for swappable tokens?

If yes, how can we use these interfaces?