[Feature] Opcodes for array operations.

[d0cd]

🚀 Feature

With the latest increase in array sizes to 512, array operations in AVM bytecode can be cumbersome. In order to:

• write to an element
• slice an array
• extend an array you must cast the full array entirely. For large arrays, this results in a long instruction that significantly increases the maximum program size.

Supporting this would result in condensed bytecode for specific use cases.