Automatically create directory when creating a new project

[nathanfranke]

Describe the project you are working on

Haven't made it yet

Describe the problem or limitation you are having in your project

When creating a new project, there are many steps to create a typical directory structure.

• Type the directory name you want (e.g. my-new-project)
• Click "Create Folder"
• Re-type the project name you want (e.g. My New Project)

Since I make so many projects for testing, this can get tedious.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

• Replace the "Create Folder" button with a CheckButton, enabled by default.

When "Create Folder" is active:

• The project name will be converted to the project directory using some algorithm. I propose: My Project Name->my-project-name, Test1->test1.
• Changing the project name will modify the project path (only if the path wasn't previously changed).
• The user is allowed to change the project path and it will not be automatically changed unless the user reverts their changes and changes the project name.
• Browsing to a path will create a new folder under that path.

When "Create Folder" is inactive:

• The project path is never changed by the engine.
• The project path must exist before the project can be created.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

demo.mp4

If this enhancement will not be used often, can it be worked around with a few lines of script?

Cannot be worked around without modifying the project manager

Is there a reason why this should be core and not an add-on in the asset library?

The project manager is already part of the editor

[Calinou]

Related to #2754.

[AaronRecord]

I think the project folder name should use snake casing as that's what godot and the Godot demo projects use: https://github.com/godotengine/godot-demo-projects/tree/master/2d

[nathanfranke]

I think the project folder name should use snake casing as that's what godot and the Godot demo projects use

hmm, most of my major projects have a git repository and I usually name those with dashes (e.g. godot-proposals).

[Calinou]

Does this proposal address godotengine/godot#60332, or do extra steps need to be taken for this? This is something users regularly stumble upon, so we should try to address it for 4.0.

[nathanfranke]

I wouldn't say this proposal would solve that issue, since (at least in my PR) disabling Create Folder basically behaves the same as it did before (thus allowing users to brick their engine). A fail safe is definitely a good idea, I'll probably add that to my PR.

(Edit: implemented in PR)