refactor a couple things

src/assembler/assemble.h

@@ -1,16 +1,6 @@
 #pragma once
 
-#include "../instruction.h"
-
-typedef struct {
-    Instruction* at;
-    size_t len;
-    size_t capacity;
-} Program;
-
-Program newProgram(void);
-void addInstructionToProgram(Program* program, Instruction inst);
-void freeProgram(Program* program);
+#include "program.h"
 
 Program createProgramFromText(const char* input);