Add setting for default profile for new codespace connections

[JustinGrote]

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Problem

On a new Codespace connection in vscode, Codespaces always uses my default profile. My default profile is heavyweight with extensions and causes the codespace to take forever to start up as extensions are copied and installed. As a workaround I made my default profile very sparse with extensions, and have a secondary profile where my "usual" extensions live. This is very awkward DX.

Solution

I would like an option in the vscode extension options something like github.codespaces.defaultProfile, which will let me specify which profile to use when connecting to a new codespace by default. If I had this I can make a separate slim "codespaces" profile that inherits from my default profile settings, but only includes the minimum extensions to start quickly, and from there I can select other profiles for C#, etc.

[github-actions[bot]]

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