Using a `bslib::value_box()` breaks Quarto dashboards

[gadenbuie]

This example from https://github.com/quarto-dev/quarto-cli/issues/9454

---
format: dashboard
---

# Page 1

## {.sidebar}

This sidebar is not toggleable anymore

## Main body

### Value box

```{r}
bslib::value_box(
  'Adelie penguins',
  theme = "danger",
  value = 23432,
  full_screen = FALSE ## This is nevertheless possible in the dashboard 
)

breaks because this causes the bslib components js to be loaded, which attempts to register bslib's CustomElements that have already been registered by Quarto

localhost/:1 Uncaught DOMException: Failed to execute 'define' on 'CustomElementRegistry': the name "bslib-tooltip" has already been used with this registry at http://localhost:6054/issue-9454_files/libs/bslib-component-js-0.7.0/web-components.min.js:217:46 at Array.forEach () at http://localhost:6054/issue-9454_files/libs/bslib-component-js-0.7.0/web-components.min.js:217:19 at http://localhost:6054/issue-9454_files/libs/bslib-component-js-0.7.0/web-components.min.js:217:183

I suspect the issue isn't just about `bslib-tooltip`, but also anything else where we've used a web component or custom element.

We probably need better coordination with Quarto on this one, but I think in the mean time we probably should avoid registering existing components.

[gadenbuie]

Okay, it's not just duplicate component registry, we also assume jQuery is available in sidebar.ts.

[gadenbuie]

Okay, it's not just duplicate component registry, we also assume jQuery is available in sidebar.ts.

It turns out this is okay, beyond adding some noise in the console. The errors from trying to call $() occur in event handlers and don't break functionality. The biggest issue is re-registering bslib components when they already exist on the page, that should be fixed by #1045.

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