Add feature: Create .env.example if not exists

[krabhi1]

Feature Proposal

Currently, the tool syncs the .env file with .env.example, but it expects that .env.example already exists. To improve usability, add a feature where the tool automatically creates .env.example (based on variable keys in .env, with values left blank or commented) if it does not exist. This will streamline first-time setup for new projects and reduce manual steps for developers.