Validation of project and integration root directories.#4608

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sonntag-philipp wants to merge 5 commits intoionic-team:developfrom

sonntag-philipp:issue/4599

Commits on Nov 13, 2020

Added cli tool validation for serve command.
Philipp Sonntag
committed
Added new Exception and better handling of cli errors.
Philipp Sonntag
committed

Commits on Nov 14, 2020

Revert of exisiting changes after new feedback.
Philipp Sonntag
committed

Commits on Nov 21, 2020

Added exception when directory path is not accessible.
Philipp Sonntag
committed
Added path validations for integrations.
Philipp Sonntag
committed