* add support for svg icons
* remove SVG helper struct
* forgot to remove default features
* rework api for custom glyphs
* remove unused file
* expose custom glyph structs
* remove `InlineBox`
* use slice for TextArea::custom_glyphs
* offset custom glyphs by text area position
* remove svg feature
* remove unused file
* add scale field to CustomGlyphInput
* update custom-glyphs example to winit 0.30
* fix the mess merge conflicts made
* add final newline
* make custom-glyphs a default feature
* remove custom-glyphs feature
* remove unnecessary pub(crate)
* rename CustomGlyphDesc to CustomGlyph
* rename CustomGlyphID to CustomGlyphId
* improve custom glyph API and refactor text renderer
* rename CustomGlyphInput and CustomGlyphOutput, add some docs
