feat(tazjin/rlox): Add runtime type error handling

Change-Id: I0d52bc9ff5be6421cb4131265ed28ce1ea7d8ff3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2282
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI

users/tazjin/rlox/src/errors.rs

@@ -4,6 +4,7 @@ pub enum ErrorKind {
     UnterminatedString,
     UnmatchedParens,
     ExpectedExpression(String),
+    TypeError(String),
 }
 
 #[derive(Debug)]