Create file selection when creating a new file.

[0xWDG]

Create file selection when creating a new file.

See: #27

[KaiTheRedNinja]

File extension inference is our current solution to this problem. We may chose to go the xcode route and offer code templates as well in a pop-up, but thats for the future.

[nanashili]

We might want to make the textfield a first responder so we can allow the field to edited. I added a reference below for some help.

https://stackoverflow.com/a/49336194/17483038

[KaiTheRedNinja]

AuroraEditor/AuroraEditor/Base/NavigatorSidebar/Model/ProjectNavigator/OutlineTableViewCell.swift

Line 185 in 473dbed

class SpecialSelectTextField: NSTextField {

This is dummy code where in the future the feature could be implemented

[nanashili]

The following PR handles this idea: #149