chore: add v13 welcome page content (#27549)

* feat: add v13 splash page content (wip)

chore: add video link for v13 inside graphql context and root resolver. add migration tests outside of migration manager and update component tests to test aspects

chore: update copy to most recent. Needs onlink deployments

chore: opt for named slot in major version welcome as we still want to show the changes whether or not the video is present

chore: fix video margin by shrinking the margin for a more appealing loadout

chore: update onlinks for what is expected in deploy

chore: adjust margins around video, move video up, and reduce margin on major welcome title

chore: bump release date to 8/29

chore: update stubbed query to reference actual video

* Update packages/launchpad/src/migration/MajorVersionWelcome.vue

Co-authored-by: Mark Noonan <mark@cypress.io>

* Update packages/launchpad/src/migration/MajorVersionWelcome.vue

Co-authored-by: Mark Noonan <mark@cypress.io>

* chore: update code elements to be inlinecodefragments

* chore: update utm links to reflect correct nomenclature

* stub migration src in  network performance launchpad test on video as abortcontroller is difficult to test with current ctx setup

---------

Co-authored-by: Mark Noonan <mark@cypress.io>

system-tests/projects/migration-v12-to-v13/cypress.config.js

@@ -0,0 +1,10 @@
+const { defineConfig } = require('cypress')
+
+module.exports = defineConfig({
+  e2e: {
+    setupNodeEvents (on, config) {
+      // implement node event listeners here
+    },
+  },
+  supportFile: false,
+})

system-tests/projects/migration-v12-to-v13/cypress/e2e/spec.cy.js

@@ -0,0 +1,5 @@
+describe('migration v12 to v13', () => {
+  it('passes', () => {
+    expect(true).to.be.true
+  })
+})