fix(deps): update react monorepo to v19 (major)

This MR contains the following updates:

Package	Change	Age	Confidence
react (source)	^18.3.1 -> ^19.0.0
react-dom (source)	^18.3.1 -> ^19.0.0

---

Release Notes

facebook/react (react)

v19.1.1

Compare Source

v19.1.0

Compare Source

v19.0.0

Compare Source

facebook/react (react-dom)

v19.1.1

Compare Source

v19.1.0

Compare Source

v19.0.0

Compare Source

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever MR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this MR, check this box

---

This MR has been generated by Renovate Bot.