write bytecode debugging script and start working on functions

src/translator/bytecode_spec.md

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+# Bytecode Specification
+
+## OP_LOAD_CONST
+
+loads and initialises a value from the constant buffer into the provided register.
+
+this operation 4 operands.
+
+1. the register to write to.
+2. the type of data from the constant buffer.
+3. the length of the data in the constant buffer.
+4. the offset in the constant buffer.
+
+## OP_DECLARE
+
+initilises a variable on the current scope with a given value. errors if the variable is already initilises on the current scope.
+
+this operation takes 3 operands.
+
+1. the length of the variable name.
+2. the offset in the constant buffer of the variable name.
+3. the register of the given value
+
+## OP_LOAD_NULL
+
+sets a given register to null.
+
+this operation takes 1 operand.
+
+1. the register to set to null.