fix(skills/typescript): remove double negation rule

Removes the rule discouraging the `!!` operator in favor of Boolean() constructor. The interruptions caused by this rule outweigh its small benefit in code style consistency. > [!NOTE] > This addresses the bash permission errors shown in the provided screenshots - the !! operator in markdown was causing issues, but more importantly, the rule itself was creating workflow friction. <img width="300" src="https://github.com/user-attachments/assets/57b2dedb-4b9e-433c-987d-ca8f9308ffa2" /> <img width="450" src="https://github.com/user-attachments/assets/4989ba55-bf32-44fc-bb85-831f5841df34" />