allow up to 65536 parser events

parser events don't take up enough memory to warrant a stricter limit.
I do wonder if this limit is actually reachable with a 65536 character limit though.

crates/haku/src/parser.rs

@@ -37,6 +37,9 @@ enum EventKind {
     Advance,
 }
 
+// We don't want events taking up too much memory all of a sudden.
+const _: () = assert!(size_of::<EventKind>() == 1);
+
 struct Open {
     index: Option<usize>,
 }

rkgk.toml

@@ -73,7 +73,8 @@ max_defs = 256
 max_tokens = 4096
 
 # Maximum amount of events that the parser may emit in a single chunk.
-max_parser_events = 4096
+# These don't take up that much memory (a byte per event), so having many of these isn't a big deal.
+max_parser_events = 65536
 
 # Maximum amount of AST nodes in a single parse.
 ast_capacity = 4096