Add insta test

Author: HalidOdat

tests/insta-bytecode/scripts/arithmetic.js

@@ -0,0 +1 @@
+let x = 10 + -1; // -1 should be treated as a single emit instruction

tests/insta-bytecode/src/snapshots/insta_bytecode__compile_bytecode@arithmetic.js.snap

@@ -0,0 +1,21 @@
+---
+source: tests/insta-bytecode/src/lib.rs
+expression: output
+input_file: tests/insta-bytecode/scripts/arithmetic.js
+---
+-------------------------- Compiled Output: '<main>' ---------------------------
+Location     Handler      Opcode                            Operands
+  000000                    StoreInt8                         value:10, dst:r02
+  000006                    StoreInt8                         value:-1, dst:r03
+  00000c                    Add                               lhs:r02, rhs:r03, dst:r01
+  000019                    PutLexicalValue                   src:r01, binding_index:0
+  000022                    CheckReturn                       
+  000023                    Return                            
+
+Register Count: 4, Flags: CodeBlockFlags(HAS_PROTOTYPE_PROPERTY)
+Constants:
+    0000: [STRING] "x"
+Bindings:
+    0000: x, scope: GlobalDeclarative
+Handlers: <empty>
+Source Map: <empty>