Implement Use Case Selection screen (#8984)

* Introduce new splash page wrapper
* Introduce new use case selection screen

cypress/e2e/1-register/register.spec.ts

@@ -65,6 +65,8 @@ describe("Registration", () => {
         cy.startMeasuring("from-submit-to-home");
         cy.get(".mx_InteractiveAuthEntryComponents_termsSubmit").click();
 
+        cy.get(".mx_UseCaseSelection_skip .mx_AccessibleButton").click();
+
         cy.url().should('contain', '/#/home');
         cy.stopMeasuring("from-submit-to-home");
 

cypress/e2e/12-spotlight/spotlight.spec.ts

@@ -357,7 +357,7 @@ describe("Spotlight", () => {
             cy.spotlightSearch().clear().type("b");
             // our debouncing logic only starts the search after a short timeout,
             // so we wait a few milliseconds.
-            cy.wait(300);
+            cy.wait(1000);
             cy.get(".mx_Spinner").should("not.exist").then(() => {
                 cy.spotlightResults().should("have.length", 2).then(() => {
                     cy.spotlightResults().eq(0)