Fix Font constructor compatibility with Majorsilence.Drawing wrapper

[Copilot]

The EAN-13 barcode improvements introduced a Font constructor call incompatible with the Majorsilence.Drawing.Font wrapper used in DRAWINGCOMPAT builds.

Changes

• RdlCri/BarCodeEAN13.cs: Removed GraphicsUnit.Pixel parameter from Font constructor

The Majorsilence.Drawing.Font wrapper (SkiaSharp-based) only provides:

• Font(string familyName, float size)
• Font(string familyName, float size, FontStyle style)

Unlike System.Drawing.Font, it lacks the GraphicsUnit overload. Since fontHeightPixels is already in pixel units, the unit specification was redundant.

- using var f = new Draw2.Font("Arial", fontHeightPixels, Draw2.GraphicsUnit.Pixel);
+ using var f = new Draw2.Font("Arial", fontHeightPixels);

Original prompt

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This section details on the original issue you should resolve

<issue_title>Bar code EAN quality</issue_title>
<issue_description>We are trying to use the ean 13 bar code but we observed some issue.
First of all, the numbers are unreadale, but when print on pdf there's no issue.
The bar code seem correct but the bar code reader has some trouble to read. The bars look well defined .
We add some other text to show that there is not any printer quality issue.

Images attached ( acquired with scanner) .

</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #182

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