Added tons of opcode documentation, changed license to ISC and a lot of file refactoring.

src/vm/print.c

@@ -1,3 +1,32 @@
+/**
+ * This file is part of the Fun programming language.
+ * https://hanez.org/project/fun/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the ISC license.
+ * https://opensource.org/license/isc-license-txt
+ */
+
+/**
+* @file print.c
+ * @brief Implements the OP_PRINT opcode for printing values in the VM.
+ *
+ * This file handles the OP_PRINT instruction, which prints the top value on the stack
+ * to the output buffer. The value is popped from the stack.
+ *
+ * Behavior:
+ * - Pops the value from the stack.
+ * - Prints the value to the output buffer.
+ *
+ * Example:
+ * // Bytecode: OP_PRINT
+ * // Stack before: [42]
+ * // Stack after: []
+ *
+ * @author Johannes Findeisen
+ * @date 2025-10-16
+ */
+
 case OP_PRINT: {
     Value v = pop_value(vm);
     Value snap = deep_copy_value(&v);