feat(frontend): use new output renderers on new run page (#10876)

## Changes 🏗️

Integrating the great work @ntindle did on the rich agent output
renderers into the new Agent run page in the library 💜

- Implemented enhanced output rendering in `<RunDetails />` using the
shared output-renderers
- Added `<RunOutputs />` sub-component at
`RunDetails/components/RunOutputs.tsx` that:
- [x] builds items from `run.outputs`, extracts metadata, picks a
renderer via `globalRegistry`, and falls back to `TextRenderer`
- [x] renders `<OutputActions />` for copy/download and a list of
`<OutputItems />`.

## Checklist 📋

### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  - [x] Run an agent on the view which outputs rich content
- [x] See the output use the new renderers, for example code is
higlighted

### For configuration changes:

None

Author: 0ubbe