New package: SparseSparse v1.0.0

[JuliaRegistrator]

• Registering package: SparseSparse
• Repository: https://github.com/sloisel/SparseSparse.jl
• Created by: @sloisel
• Version: v1.0.0
• Commit: a2649aab327214ac4f3f1fb1317be8e22b81ba1f
• Reviewed by: @sloisel
• Reference: sloisel/SparseSparse.jl@a2649aa#commitcomment-171759243
• Description: Sparse solver for sparse right-hand-sides in Julia

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[goerz]

This still has the piracy issue, see #143492 (comment)

This might be okay, but also might have pretty severe consequences (code invalidations, killing TTFX). I would strongly recommend defining a new function sparse_inv, or at the very least, this would need a thorough review from some core developers.