@nathanstack
That is how I did it:
1 - create a new radio choice column called "Project name"
2 - the values you can select will call like the main project (ex. build the car)
3 - create all the tasks as single items and assign to all of them "build the car"
4 - in the column "Project name" left click and select Group by Project Name
The name of the project will appear in bold and all the tasks with the indentation like:
Build the car
engine
tire
drive test
Works for simple projects, for more complex maybe conditional formatting will do
