## Context
Implements the "Run notebook" functionality which will run all database
or logs cells within the notebook.
<img width="206" height="110" alt="image"
src="https://github.com/user-attachments/assets/703f4f78-1e3c-43b8-8c7e-771720ac3464"
/>
Am opting to do some via `useImperativeHandle` in `QueryEditor` to
expose the `run` method, then having `ExplorerNotebookTab` calling `run`
on each database / logs cells for the run notebook action.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **New Features**
- Added a “Run notebook” action to execute all database and log query
cells together.
- The action displays a loading state and is disabled while running or
when no executable cells are available.
- Query results continue to update after execution, including when
individual queries encounter errors.
- **Tests**
- Added coverage for running executable cells and handling notebooks
without runnable queries.
<!-- 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