Bump v0.6.1

[lkdvos]

Release v0.6.1

Compare: v0.6.0...v0.6.1
Date: 2025-12-28

Added

• Support for null-space computation via Householder QR in the GenericLinearAlgebra extension (#132).
• New truncated-eigensolver variants: eig_trunc_no_error and eigh_trunc_no_error (#117).
• New truncated-singular value variant: svd_trunc_no_error to improve GPU synchronization and AD support (#116).
• AD: ChainRules support for svd_vals, eig_vals, eigh_vals, and diagonal (#107).

Changed

• Improved GPU compatibility for some wrapper arrays (#100).
• Test infrastructure migrated to a common TestSuite to reduce duplication (#119, #130, #131, #127, #125, #123, #124).

Fixed

• ishermitian now correctly handles all-zero matrices (#121).

[lkdvos]

Given that the remainder of the changes are mostly test-suite related, I think it is fair to already tag this to unblock some of the progress in TensorKit as well. I updated the changelog and have a draft for release notes above, since this is a patch release I don't mind just posting this today.

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