changed fds to array of pointers

[nagyation]

added fd_count to count the number of childs or others who are using the fd, so won't deallocate it unless no one is using it.

still working on it to enhance it

[thethumbler]

You can't use inode->ref because multiple file descriptors can point to the same inode, use file->ref instead. Some parts need to be reworked, but overall, good work.

And Nagy, consistency, please :"D

[nagyation]

Yea I was going through the code to understand more, at first I used fd_count, but okay I will rename it to ref if that matches the consistency 😂
And really I try my best to match with your code style,
And we can make a test for that if possible would be great :'D

[nagyation]

I was thinking about caching the fd instead of kfree it, for not wasting a lot of time allocating and deallocating

[thethumbler]

@nagyation caching is only effective if the resource is used frequently, applications don't usually open/close files 1000 times a second, so caching would be an over complication, and mostly a waste.

Also we would use SLxB allocator later, the caching would be embedded in the allocator itself for many object types.

About ref, it's literally there :"D I was gonna do it but had more important stuff to work on :"D

[nagyation]

@mohamed-anwar check it now 🤔

[thethumbler]

@nagyation checked it, will pull it when I push my local changes. Nice work!