Added some comments and explanation

Added some comments, fixed a nasty heap bug

Made userland program workflow cleaner

Reworked interrupt handlers to firts bind a template function(in asm) to each ISR, which then calls our custom interrupt handlers in C. Modified paging flags to assimilate hardware. Completed design of threads and ran userland process as test. To do: revamp makefile and directory design of user processes, make an actual 'system' process

Implemented processes and threads halfway... gonna commit anyways since im travelling, unverified version

Added vfs and ext2 functions to get size of file for dynamic file read

Reworked VFS functions to use file descriptors instead of parsing path all the time. Found some heap bugs in the process and fixed them

Slighly tweaked pagedir cleanup function for efficiency

Slighly tweaked pagedir cleanup function for efficiency

Implemented more helper functions to manipulate and cleanup processes and threads

Implemented skeleton for process and threads, made a function to release all of a process's memory once it's terminated

Changed some constant names regarding GDT

Renamed a constant and removed test cases

Removed some unnecessary types

Removed some unnecessary types