feat(furvm): add push byte as int instruction

furvm/include/furvm/instruction.hpp

@@ -11,6 +11,13 @@ enum class instruction_t : byte {
      */
     NoOperation = 0,
 
+    /**
+     * @brief Pushes an integer from a byte onto the stack.
+     *
+     * Pushes an integer constructed from a next byte onto the stack.
+     */
+    PushB2I,
+
     /**
      * @brief Pushes a constant onto the stack.
      *

furvm/src/main.cpp

@@ -6,7 +6,9 @@
 #include <array>
 #include <cstddef>
 
-static constexpr std::array<furvm::byte, 1> s_bytecode = {
+static constexpr std::array<furvm::byte, 3> s_bytecode = {
+    furvm::byte(furvm::instruction_t::PushB2I),
+    67,
     furvm::byte(furvm::instruction_t::Return),
 };