No highlight for `jsx` or `tsx` syntax

### What happened

Highlights for `jsx` and `tsx` doesn't work. The code is shown, without any sort of highlight

### Version

0.0.9

### Platform

macOS

### Which editor's theme

_No response_

### Where deck looked

```text

```

### Did the window close on its own?

```text

```

Reproduce the issue on macOS using version 0.0.9 with code containing JSX and TSX syntax. Trace the syntax-highlighting entry point and compare the behavior for both syntaxes; done means JSX and TSX code is visibly highlighted rather than shown as plain text.

Written by the indexing model from the issue text.