julia engine: include cell label in progress messages

[cwickham]

Bug description

Both the knitr and jupyter engine include cell labels in their output when running quarto render. It would be nice if julia did the same.

Steps to reproduce

Here's file with a code cell that has a label set:

---
title: "Untitled"
format: html
engine: julia
---

```{julia}
#| label: addition
1 + 1
```

Expected behavior

For example, something like knitr output:

processing file: r.qmd
1/3           
2/3 [addition]
3/3           
output file: r.knit.md

Actual behavior

Code cells are numbered but don't add the label (I do appreciate the line number in the output!):

quarto render julia.qmd
Running [1/1] at line 7:  1 + 1

Your environment

• OS: Mac Sequoia 15.0

Quarto check output

Quarto 1.6.21
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.4.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.46.3: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.6.21
      Path: /Applications/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: v2024.03.13
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: TinyTex
      Path: /Users/charlottewickham/Library/TinyTeX/bin/universal-darwin
      Version: 2024

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

[✓] Checking Python 3 installation....OK
      Version: 3.12.2
      Path: /Users/charlottewickham/.pyenv/versions/3.12.2/bin/python
      Jupyter: 5.7.2
      Kernels: julia-1.10, ark, python3

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

[✓] Checking R installation...........OK
      Version: 4.3.3
      Path: /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources
      LibPaths:
        - /Users/charlottewickham/Library/R/arm64/4.3/library
        - /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library
      knitr: 1.45
      rmarkdown: 2.28

[✓] Checking Knitr engine render......OK