[JavaScript] SolidStart SDK

[andreiborza]

### Initial Tasks
- [ ] https://github.com/getsentry/sentry-javascript/issues/12545
- [ ] https://github.com/getsentry/sentry-javascript/issues/12546
- [ ] https://github.com/getsentry/sentry-javascript/issues/12547
- [ ] https://github.com/getsentry/sentry-javascript/issues/12550
- [ ] https://github.com/getsentry/sentry-javascript/issues/12549
- [ ] https://github.com/getsentry/sentry-javascript/issues/12551

### Post Release Tasks
- [ ] https://github.com/getsentry/sentry-javascript/issues/12554
- [ ] https://github.com/getsentry/sentry-javascript/issues/12555
- [ ] https://github.com/getsentry/sentry-javascript/issues/12556
- [ ] https://github.com/getsentry/sentry-javascript/issues/12557
- [ ] https://github.com/getsentry/sentry-javascript/issues/12553

### Stable Release Tasks
- [ ] SolidStart Setup Wizard
- [ ] https://github.com/getsentry/sentry-javascript/issues/13785
- [ ] Component tracking
- [ ] https://github.com/getsentry/sentry-javascript/issues/13762

### Misc tasks and Bugs
- [ ] Traces aren't connected on Vercel