Fix arm64 MacOS builds.

[d4rk]

Main changes are:

1. Added an ARM64 assembly version of ft_strsplit.s since the x86 ASM doesn't work on ARM64.
2. Updated Makefile to use it on arm64 architectures.
3. Changed the type of t_bool to unsigned to avoid the single-bit-bitfield-constant-conversion warning.

[stephen-gardner]

Thank you for the pull request, @d4rk. Please note that the ft_strsplit used in this project differs from the libft project spec. As seen here and here, the ft_strsplit used in this project does a single memory allocation instead of many.

[d4rk]

Thank you for the pull request, @d4rk. Please note that the ft_strsplit used in this project differs from the libft project spec. As seen here and here, the ft_strsplit used in this project does a single memory allocation instead of many.

Got it, thanks for the clarification. I'll try to address this some time this week.

[stephen-gardner]

Hi @d4rk, thanks for the revisions! Unfortunately, I don't have a test environment for ARM64 architecture, except on my work machine. It could be some time before I can properly review the change. Is there a particular reason why you chose to write this function in assembly instead of C?

[d4rk]

Hi @d4rk, thanks for the revisions! Unfortunately, I don't have a test environment for ARM64 architecture, except on my work machine. It could be some time before I can properly review the change.

No worries at all.

Is there a particular reason why you chose to write this function in assembly instead of C?

Not really, I thought it might be fun :)