[Feature Request]: Creation of an initiated transformation

### What would you like to happen?

I'm opening this activity to explore the possibility of creating a transformation called "START" or something that simply indicates that the pipeline starts at that step by default. This would be more of a project documentation tool, making it more visual for new developers to understand where a pipeline begins. This would greatly facilitate multi-input pipelines.

Note: I know the pipeline starts with all inputs, but this would be more for improved visual understanding.

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms

No files, tests, or entry points are named; start by reviewing the existing Transforms component and how pipeline inputs and transformations are represented. Determine the design for a visual START transformation that marks the pipeline's default beginning, supports multi-input pipelines, and preserves current execution behavior.

Written by the indexing model from the issue text.