looking for the photoshop tree structure for my study project

There are multiple possible tree structures you could analyze. Which one do you want? You could diagram the structure of the menus, commands, panels, and options; or the standard image editing workflow (which actions to take to achieve different editing goals); or the organization of the Photoshop code modules.

One place where a hierarchical tree of Photoshop exists is in the Photoshop User Guide online. You could draw a diagram based on how that is organized into headings and sub-headings. That could be your best option, because it is task-oriented/user-centered.

If you wanted to diagram how the application code is organized when installed, on the Mac you can right-click the application and choose Show Package Contents.

So there are many possible ways to do it. Unfortuately, none of those hieararchies is available as the diagram you attached as an example, so whichever type of tree you want, you will still have to draw that yourself.

So you want to list every menu command, submenu, palette, and scripting command and what it does. Good luck, there are thousands of features.

What do you mean? A tree structure is used to describe all sorts of information. Please give us a reference or example.