bug: Letter spacing for text is not being correctly applied when importing a .zip without position-data

[Cenadros]

Steps To Reproduce

We're working in the https://github.com/penpot/penpot-exporter-figma-plugin and we've generated a .zip file from Figma containing a text node with all the information given in the content. Although the letter-spacing is being imported, it's not being rendered.

The steps to reproduce are these:

1. You can try from the main branch of the penpot-exporter or download the generated .zip. If you use the attached .zip you can jump to step 6.
2. Build the plugin with node 20 (npm run build)
3. Import the plugin in FIgma using the manifest.json.
4. Create a text node in Figma and assign a letter space (you can do it in px or % but it's easier to see the translation in px)
5. Use the plugin to export the file.
6. Import the generated file into Penpot

Expected behavior

The letter spacing being imported through text content should be rendered correctly.

Actual behavior

The letter spacing is being imported but it's not being rendered until you modify the property in Penpot.

Screenshots or video

The imported file with 50px of letter spacing but not rendered:

The same text with correct 50px of letter spacing after modifying it:

Desktop (please complete the following information)

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Smartphone (please complete the following information)

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Environment (please complete the following information)

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Frontend Stack Trace

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Backend Stack Trace

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Additional context

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