rename panic to interrupts to better reflect it's future role

src/kernel/kernel.c

@@ -2,7 +2,7 @@
 #include <stddef.h>
 #include <drivers/uart.h>
 #include <syscon/syscon.h>
-#include <kernel/panic.h>
+#include <kernel/interrupts.h>
 #include <kernel/memory.h>
 
 void kmain()

src/kernel/memory.c

@@ -2,7 +2,7 @@
 #include <stddef.h>
 #include "drivers/uart.h"
 #include "memory.h"
-#include "panic.h"
+#include "interrupts.h"
 
 HeapHeader *heap_free_list;
 extern uint8_t _heap_start[]; // named in the linker script