Improvements for the Source Maps Modal

[smeubank]

The source maps modal has some rough edges which could be improved upon. This ticket acts as a collection of these ideas

### Stretch Goals
- [ ] https://github.com/getsentry/sentry/issues/85054
- [ ] https://github.com/getsentry/sentry/issues/76321
- [ ] https://github.com/getsentry/sentry/issues/76379
- [ ] https://github.com/getsentry/sentry/issues/74266
- [ ] https://github.com/getsentry/sentry/issues/74191
- [ ] https://github.com/getsentry/sentry/issues/67148
- [ ] https://github.com/getsentry/sentry/issues/60504
- [ ] Adapt source maps wizard to explain JS in HTML
- [ ] Unminify on 3rd party code, consider having more education
- [ ] https://github.com/getsentry/sentry/issues/85730
- [ ] https://github.com/getsentry/sentry/issues/86685

This list is not in order of prio, nor exhaustive

[matejminar]

Closing, refined into other tickets.