Initial commit for Query Store extension

[kisantia]

Initial commit for the Query Store extension. No functionality added, just the bare bones code needed to build the new extension.

[Charles-Gagnon]

Looks good aside from the one eslint thing

[alanrenmsft]

I don't have a strong opinion on whether we should let this merged into main since no functionality has been introduced. usually I'd recommend to create a feature branch so that the changes can be reviewed in smaller PRs and merge it to main when the planned features are implemented.

[kisantia]

I can change this to target a feature branch if that's preferred, but thought this would be ok to go into main since it's a separate extension and won't be included in a release until it's uploaded in the extensions gallery.

[alanrenmsft]

@kisantia that is why I don't have a strong opinion, feel free to merge to main.

I can change this to target a feature branch if that's preferred, but thought this would be ok to go into main since it's a separate extension and won't be included in a release until it's uploaded in the extensions gallery.

[Benjin]

Work item for tracking: https://powerbi.visualstudio.com/Trident/_workitems/edit/1110640

[alanrenmsft]

@kisantia this commit caused 2 dependBot alerts, I took a look at them and realized you might have copied the yarn.lock file from another extension, to make it accurate, could you please regenerate the yarn.lock so that it only contains the packages that are actually being used?

[alanrenmsft]

@kisantia I'll do it, a pr will be out shortly.

[kisantia]

Thanks @alanrenmsft! Forgot to regenerate it after removing the unused dependencies in package.json in an earlier commit in this PR