Improvement: Environment Variables and Secrets Management

Recent updates to Qovery have streamlined the management of environment variables by allowing users to configure them directly from project and environment views, eliminating the need to navigate individual services. The introduction of bulk actions enables users to select and delete multiple environment variables simultaneously, significantly reducing the time and effort involved in managing large sets. Additionally, the scope selection process has been simplified, displaying only relevant options to prevent errors and confusion. These enhancements aim to make managing environment variables more efficient, with promises of further improvements in future updates.