did some restructuring, got multitasking almost working

kernel/process.h

@@ -0,0 +1,20 @@
+#ifndef KPROCESS_H
+#define KPROCESS_H
+
+#include <stdint.h>
+
+typedef enum {
+    STATE_READY,
+    STATE_SLEEPING,
+    STATE_DEAD
+} process_state_t;
+
+typedef struct {
+    uint32_t pid;
+    uint32_t esp;
+    uint32_t cr3;
+    process_state_t state;
+    uint32_t sleep;
+} __attribute__((packed)) process_t;
+
+#endif