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

src/vm/core/jump_if_false.c

@@ -1,3 +1,33 @@
+/**
+ * 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 jump_if_false.c
+ * @brief Implements the OP_JUMP_IF_FALSE opcode for conditional jumps in the VM.
+ *
+ * This file handles the OP_JUMP_IF_FALSE instruction, which jumps if the top
+ * stack value is falsey (0, false, nil, etc).
+ *
+ * Behavior:
+ * - Pops condition value from stack
+ * - Jumps to operand IP if falsey
+ * - Continues normally if truthy
+ *
+ * Used for:
+ * - If statements
+ * - While loops
+ * - Logical expressions
+ *
+ * @author Johannes Findeisen
+ * @date 2025-10-16
+ */
+
 case OP_JUMP_IF_FALSE: {
     Value cond = pop_value(vm);
     int truthy = value_is_truthy(&cond);