Merge gstreamer-sys into gstreamer-rs
TODO
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Add CI for the -sys subdirectories, including cargo test
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Check if the docs job still works correctly -
Update URLs for the sys and non-sys docs -
Double-check if everything is updated correctly -
Move all issues from gstreamer-rs-sys here - Not archiving the old repository as a bugfix release might still be needed
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Update gir and regenerate everything
Edited by Sebastian Dröge