Application.dataPath points to /Assets

If you need a quick handle on the Assets folder in the Editor then you can simply use:

// Returns <path to project folder>/Assets
string pathToAssetsWithoutEndingSlash = Application.dataPath;

If all you need is the project path without "/Assets" then use this:

string pathToProjectWithoutEndingSlash = Application.dataPath.Substring(0, Application.dataPath.LastIndexOf('/'));

Asset Recommendations

Here are some free and paid assets I think may be useful to you. If you get one of them then a small part of the money you spend will also help fund this project. Thank you.