v0.8 release notes

[vmakovet]

Features in This Release

BLAS

LAPACK

RNG

DFT

Sparse BLAS

Documentation update

Known Issues and Limitations

[vmakovet]

Release notes for RNG:

• Added the PCG64 DXSM device pseudorandom number generator: #670.
• Added support using OpenRNG in place of ArmPL: #660.

[Rbiessy]

For DFT:

• Add experimental support for AdaptiveCpp with cuFFT and rocFFT backends #665

I can't think of any else to mention for the other domains as we mainly merged fixes.

[itopinsk]

Added OpenSSF scorecard badge #652