Loading text without fonts

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I'm trying to build a terminal renderer for simple SVG files consisting only of text. I'm interested in extracting the text from an SVG, and I'd like to know the properties like the fill color (which is why I'd like to use `usvg` rather than `roxmltree` directly), but I don't actually care about the font at all, and I don't need the layout or glyph position information.

Would it be possible to support *simple* text element extraction without having the fontdb? I'd love to *just* get the `TextChunk`/`TextSpan` information, and it'd be fine if all the information like `.dx()`, `.dy()`, positioned glyphs, decoration spans, etc were all unavailable. (I do want the explicit x/y positioning info from the SVG itself, and it'd be helpful to know *whether* the span is decorated.)

Start by tracing how usvg currently exposes text through TextChunk and TextSpan, and where fontdb is required compared with direct roxmltree parsing. Define the supported extraction data, including SVG x/y positions and decoration state, and verify that font-dependent fields such as dx, dy, and positioned glyphs remain unavailable.

Written by the indexing model from the issue text.