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

src/vm/arrays/slice.c

@@ -1,3 +1,37 @@
+/**
+ * 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 slice.c
+ * @brief Implements the OP_SLICE opcode for array slicing in the VM.
+ *
+ * This file handles the OP_SLICE instruction, which creates a new array containing
+ * elements from the original array between specified start and end indices.
+ *
+ * Behavior:
+ * - Pops end index, start index, and array from the stack
+ * - Creates a new array containing elements from start to end-1
+ * - Pushes the new array onto the stack
+ *
+ * Error Handling:
+ * - Exits with error if arguments are wrong types
+ * - Handles negative indices and out-of-bounds cases gracefully
+ *
+ * Example:
+ * // Bytecode: OP_SLICE
+ * // Stack before: [3, 1, [10,20,30,40]]
+ * // Stack after: [[20,30]]
+ *
+ * @author Johannes Findeisen
+ * @date 2025-10-16
+ */
+
 case OP_SLICE: {
     Value end = pop_value(vm);
     Value start = pop_value(vm);