feat(lib): Added strstr, mem(r)chr and fabs(f) functions.

[MrLego8-9]

feat(lib): Added auxiliary math functions and macros

[pitust]

BTW: You don't need to delete PRs, you can just force push to your old repo

[pitust]

Please rebase your PR.

[pitust]

Please rebase your changes

[pitust]

Dont close the pr, rebase and push

[MrLego8-9]

rebased

[pitust]

Please use git's rebase functionailty instead of merging, becuase merging generates an ugly merge commit (especially on github which)

Also, the readme changing commit is not conforming to conventional commits.

[MrLego8-9]

I used git's rebase, but it seems like it still needed to merge. Moreover, the readme changing commit is not mine.

[pitust]

i meant... operating on q not b...

[MrLego8-9]

It made more sense to remove b.