CLI: support associating a profile to a worksapce

[sandy081]

Support associating a profile to a workspace from CLI using the argument --settings-profile. Profile will be created if not exist. Eg: code <folder/workspace> --settings-profile <name>

[bpasero]

As a follow up, we should probably look into the code in desktop.main.ts that deals with the profile:

• how is this supported in web?
• can we optimize entering the profile given we call this so early even before some services are created?
• are there things created before the profile switch that need to update when the profile changes or is that being taken care of already?
• is the code safe for parallel execution? because I can run code-insiders --profile ... to restore multiple windows so the code gets executed multiple times?

[sandy081]

how is this supported in web

In web, would be adding profileInfo api so that embedder can provide the info for the opened workspace. For eg., embedder can pass the profile template blob for the workbench to initialise.

can we optimize entering the profile given we call this so early even before some services are created?

It is well optimised now. But will see if we can optimise further.

are there things created before the profile switch that need to update when the profile changes or is that being taken care of already?

Yeah, they are taken care of.

is the code safe for parallel execution? because I can run code-insiders --profile ... to restore multiple windows so the code gets executed multiple times?

Yes it is. Some of the changes in this PR are meant to handle this.