feat(editor, core): Integrate PostHog (#3865)

* Integrate PostHog - Part 1: Groundwork (#3753)

* Integrate PostHog - Part 2: Event capture (#3779)

* Integrate PostHog - Part 3: Session recordings (#3789)

* Integrate PostHog - Part 4: Experiments (#3825)

* Finalize PostHog integration (#3866)

* 📦 Update `package-lock.json`

* 🐛 Account for absent PH hooks file

* ✨ Create new env `EXTERNAL_FRONTEND_HOOKS_FILES`

* ⚡ Adjust env used for injecting PostHog

* 🐛 Switch to semicolon delimiter

* ⚡ Simplify to `externalFrontendHookPath`

* Refactor FE hooks flow (#3884)

* Add env var for session recordings

* inject frontend hooks even when telemetry is off

* allow multiple hooks files

* cr

* 🐛 Handle missing ref errors

* 🔥 Remove outdated `continue`

* 🎨 Change one-liners to blocks

* 📦 Update `package-lock.json`

Co-authored-by: Ahsan Virani <ahsan.virani@gmail.com>

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

@@ -1,5 +1,5 @@
 <template>
-	<div class="sticky-wrapper" :style="stickyPosition" :id="nodeId">
+	<div class="sticky-wrapper" :style="stickyPosition" :id="nodeId" ref="sticky">
 		<div
 			:class="{'sticky-default': true, 'touch-active': isTouchActive, 'is-touch-device': isTouchDevice}"
 			:style="stickySize"
@@ -67,6 +67,9 @@ export default mixins(externalHooks, nodeBase, nodeHelpers, workflowHelpers).ext
 			type: Number,
 		},
 	},
+	mounted() {
+		this.$externalHooks().run('sticky.mounted', { stickyRef: this.$refs['sticky'] });
+	},
 	computed: {
 		defaultText (): string {
 			if (!this.nodeType) {