[FEATURE] Warn if project folder is in VCC's application directory.

[anatawa12]

Is your feature request related to a problem? Please describe.
Few hours ago, my friend updated VCC and he lost all him projects because he saved Projects in VCC's application directory.

Describe the solution you'd like
To avoid such situation in the future, I want VCC to warn if we were creating new project into or adding existing projects in VCC application directory.

Describe alternatives you've considered
N/A

Additional context
In his case, VCC is installed to D:\VRChat Creator Companion and project is in D:\VRChat Creator Companion\Projects.

He says .minecraft directory for Minecraft (in AppData and consists of both application file and user data) is frequently modified by users, so he thought VCC's application folder is also be one place for projects.

There may be more people who think application folder is place for projects than developers thought.

[anatawa12]

Recent VCC 2.0.x update breaks projects of at least four users because lack of this. This is important for users.

• Japanese Tweet by qfwk_vrc
• Japanese Tweet by miyakon07VRC
• Japanese Tweet by John_do_iwan
• Japanese Tweet by apkallu_qiwi

[Sayamame-beans]

And one person said, "It is not general knowledge that projects should not be placed in the application's folder."
Since we are using an "SDK", it is doubtful that this logic will apply to us as developers, but I think it is still desirable to prevent accidents that can be prevented.

• Japanese Tweet by tokiwailm

[Faxmashine]

The installer used to delete everything in the VCC's installation folder. This has been fixed, and it only deleted folders and DLLs it created itself. User-created folders and files should be safe.

We did not add a warning about adding user folders to the installation folder (yet).

https://vcc.docs.vrchat.com/news/release-2.1.0/#installer-change

[orels1]

Some in-progress screens that should help avoid these issues:

[orels1]

Project path validator will now also check against the VCC exe path