feat: Support RISC-V RVV

[romange]

Thanks @howjmay ! Do you know if it possible to run tests on RISC-V on github?

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 77.80%. Comparing base (d30de86) to head (8894f2b). Report is 90 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #313 +/- ## ========================================== + Coverage 77.60% 77.80% +0.19% ========================================== Files 103 108 +5 Lines 7824 8114 +290 ========================================== + Hits 6072 6313 +241 - Misses 1752 1801 +49 ```

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[howjmay]

Hi. I have a repo to host prebuilt binary of riscv-gnu-toolchain. RVV has been supported but intrinsics are not, so I need to use gcc 14 to build the gnu toolchain

https://github.com/howjmay/prebuilt-riscv-toolchain

[romange]

@howjmay do you mind signing the commit?

[howjmay]

signed! Thanks

[howjmay]

The intrinsics are supported from gcc 14 https://gcc.gnu.org/gcc-14/changes.html

[romange]

@howjmay it's not really signed - see the following github article: https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification I used gpg to create a sign key and add it to my github account.

both helio and dragonfly require signed commits.

[howjmay]

done!

[romange]

Thanks!

[howjmay]

thank you too