`jupyter`: warn when kernel apparently doesn't support inline expressions (was: Stata inline code error)

Bug description

My attempt to use Stata inline code results in an apparent Python error.

Steps to reproduce

Sample doc:

---
title: "Stata inline code"
format: html
jupyter: nbstata
---

```{stata}
disp 3
```

Testing inline `{stata} disp 3`.

I attempt to create a preview from within VSCode and get the following terminal output:

Starting nbstata kernel...Done

Executing 'stata-inline.quarto_ipynb'
  Cell 1/1: ''...Done
ERROR: 

'NoneType' object has no attribute 'get'

Expected behavior

No response

Actual behavior

No response

Your environment

• IDE VSCode 1.94.0 (with Quarto extension v1.115.0)
• OS: Windows 11

Quarto check output

Quarto 1.5.57
[>] Checking versions of quarto binary dependencies...
      Pandoc version 3.2.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.41.0: OK
      Typst version 0.11.0: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
      Version: 1.5.57
      Path: C:\Users\tjhuegerich\AppData\Local\Programs\Quarto\bin
      CodePage: 1252

[>] Checking tools....................OK
      TinyTeX: (not installed)
      Chromium: (not installed)

[>] Checking LaTeX....................OK
      Tex:  (not detected)

[>] Checking basic markdown render....OK

[>] Checking Python 3 installation....OK
      Version: 3.10.12 (Conda)
      Path: C:/Users/tjhuegerich/AppData/Local/anaconda3/envs/nbstata_demo/python.exe
      Jupyter: 5.3.1
      Kernels: nbstata, python3

[>] Checking Jupyter engine render....OK

[>] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/