builds getting started tour (#10546)

* builds getting started tour

* reorganizes ts according to amirs comments

* Fix hygiene issues

* updates class names

* adds description to new configuration value

* uses core components

* PR fixes based on Charles comments

* formats css

* updates guided tour based on charles comments

* updates css formatting

* fixes read more link

* formats gettingStartedTour.ts

* updates copy

* Add CodeQL Analysis workflow (#10195)

* Add CodeQL Analysis workflow

* Fix path

* updates pr based on pr comments

* removes unused decleration

* formatting

* reformats css document

* updates file path

* updates images

Co-authored-by: Amir Omidi <amomidi@microsoft.com>
Co-authored-by: Justin Hutchings <jhutchings1@users.noreply.github.com>

src/sql/workbench/contrib/welcome/gettingStarted/media/diamondIcon.svg

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src/sql/workbench/contrib/welcome/gettingStarted/media/serverIcon.svg

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