[FEATURE] Default empty transition on new nodes

[hacheybj]

Is your feature request related to a problem? Please describe.
Almost all nodes added to a flow require at least one transition. This might seem trivial, but adding a default empty transition automatically with every created node would reduce the necessary work of adding it manually from the context menu, and allow to automatically drag/drop the connections.

Describe the solution you'd like
When adding a standard node to the flow, it is created with a default empty transition.

Describe alternatives you've considered
N/A

Additional context
N/A