Pre-release fixes & adjustments

Updated JSON schema
Fixed updating/uninstallation process (via pip-autoremove now) and added caching for pip-resolver
Implemented sections for requirements: main, dev
Checked and fixed multiple targets for PyTest tasks (implemented Compound Run Configurations)
Implemented authentication via paddle.auth.yaml file
Implemented primitive package publishing via Twine
Fixed lock files and indexer for private repositories

JetBrains-Research / paddle