feat(editor): Improve n8n welcome experience (#3289)

* ✨ Injecting a welcome sticky note if a corresponding flag has been received from backend

* 🔒 Allowing resources from `/static` route to be displayed in markown component.

* ✨ Implemented image width control via markdown URLs

* 💄Updating quickstart video thumbnail images.

* 🔨 Updated new workflow action name and quickstart sticky name

* ✨ Added quickstart menu item in the Help menu

* 🔨 Moving quickstart video thumbnail to the translation file.

* 🔒 Limiting http static resource requests in markdown img tags only to image files.

* 🔒 Adding more file types to supported image list in markown component.

* 👌 Extracting quickstart note name to constant.

* 🐘 add DB migration sqlite

* ⚡️ add logic for onboarding flow flag

* 🐘 add postgres migration for user settings

* 🐘 add mysql migration for user settings

* ✨ Injecting a welcome sticky note if a corresponding flag has been received from backend

* 🔒 Allowing resources from `/static` route to be displayed in markown component.

* ✨ Implemented image width control via markdown URLs

* 💄Updating quickstart video thumbnail images.

* 🔨 Updated new workflow action name and quickstart sticky name

* ✨ Added quickstart menu item in the Help menu

* 🔨 Moving quickstart video thumbnail to the translation file.

* 🔒 Limiting http static resource requests in markdown img tags only to image files.

* 🔒 Adding more file types to supported image list in markown component.

* 👌 Extracting quickstart note name to constant.

* 📈 Added telemetry events to quickstart sticky note.

* ⚡ Disable sticky node type from showing in expression editor

* 🔨 Improving welcome video link detecton when triggering telemetry events

* 👌Moved sticky links click handling logic outside of the design system, removed user and instance id from telemetry events.

* 👌Improving sticky note link telemetry tracking.

* 🔨 Refactoring markdown component click event logic.

* 🔨 Moving bits of clicked link detection logic to Markdown component.

* 💄Fixing code spacing.

* remove transpileonly option

* update package lock

* 💄Changing the default route to `/workflow`, updating welcome sticky content.

* remove hardcoded

* 🐛 Fixing the onboarding threshold logic so sticky notes are skipped when counting nodes.

* 👕 Fixing linting errors.

Co-authored-by: Milorad Filipović <milorad.filipovic19@gmail.com>
Co-authored-by: Milorad Filipović <miloradfilipovic19@gmail.com>
Co-authored-by: Ben Hesseldieck <b.hesseldieck@gmail.com>
Co-authored-by: Milorad Filipović <milorad@n8n.io>

packages/editor-ui/src/components/MainSidebar.vue

@@ -263,6 +263,16 @@ export default mixins(
 			},
 			helpMenuItems (): object[] {
 				return [
+					{
+						id: 'quickstart',
+						type: 'link',
+						properties: {
+							href: 'https://www.youtube.com/watch?v=RpjQTGKm-ok',
+							title: this.$locale.baseText('mainSidebar.helpMenuItems.quickstart'),
+							icon: 'video',
+							newWindow: true,
+						},
+					},
 					{
 						id: 'docs',
 						type: 'link',