feat(tazjin/rlox): Bootstrap VM for Lox bytecode

Change-Id: I479e20bf2087e5c4aa20e31b364c57ed0d961bcf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2416
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

users/tazjin/rlox/src/bytecode/errors.rs

@@ -0,0 +1,13 @@
+#[derive(Debug)]
+pub enum ErrorKind {
+    // CompileError,
+    // RuntimeError,
+    InternalError(&'static str),
+}
+
+#[derive(Debug)]
+pub struct Error {
+    pub kind: ErrorKind,
+}
+
+pub type LoxResult<T> = Result<T, Error>;