fix: Update cy.press signature to be Chainable

cli/types/cypress.d.ts

@@ -1755,7 +1755,7 @@ declare namespace Cypress {
      *    cy.press(Cypress.Keyboard.Keys.TAB) // dispatches a keydown and press event to the browser, followed by a keyup event.
      * @see https://on.cypress.io/press
      */
-    press(key: typeof Cypress.Keyboard.Keys[keyof typeof Cypress.Keyboard.Keys], options?: Partial<Loggable & Timeoutable>): void
+    press(key: typeof Cypress.Keyboard.Keys[keyof typeof Cypress.Keyboard.Keys], options?: Partial<Loggable & Timeoutable>): Chainable<null>
 
     /**
      * Get the immediately preceding sibling of each element in a set of the elements.

packages/driver/src/cy/commands/actions/press.ts

@@ -36,7 +36,7 @@ export default function (Commands: Cypress.Commands, Cypress: Cypress.Cypress, c
 
       // throwErrByPath always throws, but there's no way to indicate that
       // code beyond this point is unreachable to typescript / linters
-      return
+      return null
     }
 
     if (Cypress.browser.family === 'webkit') {
@@ -47,7 +47,7 @@ export default function (Commands: Cypress.Commands, Cypress: Cypress.Cypress, c
         },
       })
 
-      return
+      return null
     }
 
     if (Cypress.browser.name === 'firefox' && Number(Cypress.browser.majorVersion) < 135) {
@@ -71,7 +71,11 @@ export default function (Commands: Cypress.Commands, Cypress: Cypress.Cypress, c
     } catch (err) {
       $errUtils.throwErr(err, { onFail: log })
     }
+
+    return null
   }
 
-  return Commands.add('press', pressCommand)
+  return Commands.addAll({
+    press: pressCommand,
+  })
 }

system-tests/projects/cy-press-second-spec-error/cypress/e2e/first_spec.cy.js

@@ -1,5 +1,7 @@
 describe('this one should pass', () => {
   it('dispatches a key press', () => {
-    cy.press(Cypress.Keyboard.Keys.TAB)
+    cy.press(Cypress.Keyboard.Keys.TAB).then((val) => {
+      expect(val).to.be.null
+    })
   })
 })