Build the UK GE 2024 Exit Poll Tracker

[ioannakok]

Static display from 8pm on election day until the results start trickling in

### Tasks
- [ ] https://github.com/guardian/dotcom-rendering/issues/11747
- [ ] https://github.com/guardian/dotcom-rendering/issues/11750
- [ ] https://github.com/guardian/dotcom-rendering/issues/11751
- [ ] https://github.com/guardian/dotcom-rendering/issues/11753
- [ ] https://github.com/guardian/dotcom-rendering/issues/11756
- [ ] https://github.com/guardian/dotcom-rendering/issues/11764
- [ ] https://github.com/guardian/dotcom-rendering/issues/11766
- [ ] https://github.com/guardian/dotcom-rendering/issues/11765
- [ ] https://github.com/guardian/dotcom-rendering/issues/11769
- [ ] https://github.com/guardian/dotcom-rendering/issues/11767
- [ ] https://github.com/guardian/dotcom-rendering/issues/11770
- [ ] https://github.com/guardian/dotcom-rendering/issues/11771
- [ ] Exit poll tracker copy from Seán

[mxdvl]

See implementation: https://github.com/guardian/interactives/pull/1666

[sunnyclimber456]

Closing as all subtasks completed. 😁