First steps: getting memory map from Limine request and looking at it

src/mem/paging/pmm.c

@@ -0,0 +1,17 @@
+// OMG here we are. I'm cooked.
+
+/*
+pmm - Physical Memory Manager
+will manage 4kb pages physically
+it will probably need to get some info from Limine,
+to see which pages are used by kernel/bootloader/mmio/fb etc.
+*/
+
+#include "paging.h"
+
+/*
+First we'll have to discover the physical memory layout,
+and for that we can use a Limine request.
+*/
+
+uint64_t pages_bitmap[];