Allow packages to have dependencies

[Caylies]

Packages may rely on other Ballsdex packages to function. Dependencies should be declared inside the package's repository, and when the package is added, the console should state that another package needs to be installed.

Example:

Package1 relies on Package2 to work. Package1 has the following in its pyproject.toml file:

dependencies = ["Dotsian/Package2"]

DexI should be able to recognize this and prompt the user to install Package2.