support full storage key space (#100)

- The storage pointer values will no longer be truncated to the register size, allowing for the use of arbitrary storage keys
- Failed storage value reads will now guarantee to return the zero value

crates/integration/codesize.json

@@ -2,9 +2,9 @@
   "Baseline": 989,
   "Computation": 4153,
   "DivisionArithmetics": 40614,
-  "ERC20": 47343,
+  "ERC20": 47348,
   "Events": 1781,
   "FibonacciIterative": 3035,
-  "Flipper": 3393,
+  "Flipper": 3448,
   "SHA1": 33553
 }