### What

* Fixes #4388
   * this is the last piece 🥳  
* Related to
   * #4935
   * #4826

`SpaceInfo` used to be used to determine space connectivity, this is by
now done by `SpatialTopology`

Not a "pure" refactor: Slight changes in behavior
* Adding a space view via the 'plus' top left uses the default-created
list, not the now removed "all" list (which was poorly defined)
* Similarly, suggestions for root now use the default-created list
* adding entities via the add-ui no longer uses any kind of transform
analysis (it relied on SpaceInfo)
   * Does not fix  #4826
* .. since it still won't allow adding things that aren't visualizable
at all



### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested the web demo (if applicable):
* Using newly built examples:
[app.rerun.io](https://app.rerun.io/pr/4937/index.html)
* Using examples from latest `main` build:
[app.rerun.io](https://app.rerun.io/pr/4937/index.html?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[app.rerun.io](https://app.rerun.io/pr/4937/index.html?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [x] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG

- [PR Build Summary](https://build.rerun.io/pr/4937)
- [Docs
preview](https://rerun.io/preview/d27d81f094e026a2cecfd42ac25dc133d9ed26f6/docs)
<!--DOCS-PREVIEW-->
- [Examples
preview](https://rerun.io/preview/d27d81f094e026a2cecfd42ac25dc133d9ed26f6/examples)
<!--EXAMPLES-PREVIEW-->
- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
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