feat: update the FOT detector to check for external fees

[zhongeric]

Update the existing FOT detector contract to check for two scenarios:

1. when a fee is applied on a transfer NOT to or from the V2 pair
2. when a token transfer done within the context of an existing swap reverts

The returned data now includes two new bools at the end of the struct

[marktoda]

tests failing?

[marktoda]

code lgtm