all: Fix closure annotations
This was misused almost everywhere.
See https://gi.readthedocs.io/en/latest/annotations/giannotations.html#support-for-gobject-closures
and: https://www.bassi.io/articles/2023/02/20/bindable-api-2023/
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This was misused almost everywhere.
See https://gi.readthedocs.io/en/latest/annotations/giannotations.html#support-for-gobject-closures
and: https://www.bassi.io/articles/2023/02/20/bindable-api-2023/