## Context
- Updates the BarChart in our design system to support multi series in a
similar fashion to how the LineChart already supports multi series
- Update chart renderer in explorer notebooks to support multiple Y axes
using the `MultiSelector` component
- Up to 3 y columns can be selected for now (Arbitrary limit from a
color's selection POV but also just felt like anything more and the
chart doesn't feel useful)
- Only linear scale will be supported if multiple y columns are selected
(Will switch back to linear if originally on log scale)
<img width="943" height="493" alt="image"
src="https://github.com/user-attachments/assets/2eba46f0-7e41-4544-a3ff-2bf08773d11b"
/>
<img width="946" height="497" alt="image"
src="https://github.com/user-attachments/assets/4ffe7a73-6f97-4f0d-a33a-31e4035800ab"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Charts now support selecting and displaying up to three Y-axis data
series.
* Bar and line charts render multiple series with distinct colors.
* Cumulative calculations work independently across multiple selected
series.
* Chart controls provide clearer responsive layouts and limit selections
appropriately.
* **Bug Fixes**
* Logarithmic scaling automatically switches to linear when multiple
series or unsupported values are selected.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Just reorganizing the files under the Explorer folder as details are a
bit more clearer
Mainly shifting related and exclusive files into their own folder and
tests into `__tests__` folder + renaming some files
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added query result display settings for switching between table and
chart views.
- Added chart configuration options for chart type, axes, scaling,
cumulative mode, and labels.
- Automatically prevents invalid logarithmic scaling when chart data is
incompatible.
- **Refactor**
- Standardized Explorer tab and query source naming across the interface
without changing existing behavior.
- Updated Explorer navigation, routing, and page wiring to use the
standardized components.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Joshen Lim