Move packages to top level under each environment

[cwebster-99]

Currently packages are nested in the tree view, let's bring these up to the main level so it is just one expansion

[eleanorjboyd]

in the "Python Projects" section of the sidebar, each project has its environment listed, and nested under that the packages installed. The packages are nested under a dropdown which says "packages", this is redundant. Remove the "packages" dropdown and nest the installed packages instead just under the environment