Adwaita-like SCTK Frame

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Title text: ab_glyph

By default title text is drawn with ab_glyph crate. This can be disabled by disabling default features.

Title text: crossfont

Alternatively title text may be drawn with crossfont crate. This adds a requirement on freetype.

sctk-adwaita = { default-features = false, features = ["crossfont"] }