Major updates

- Improve ruby block detection heuristics
- Add block information storage and block aware movements.
- Other minor fixes

src/internal/commands/commands.cc

@@ -101,6 +101,18 @@ void Command::register_posix(BEd &ctx) {
       }
     }
   );
+  ctx.commands.insert(
+    "debug",
+    Command{
+      .address_mode = Command::AddressMode::None,
+      .suffix = Command::SuffixKind::None,
+      .desc = "",
+      .accept_zero = false,
+      .handle = [](BEd &ctx, std::span<const uint64_t>, std::string_view) {
+        syntax::dump_events(ctx.active->parser->root);
+      }
+    }
+  );
   ctx.commands.insert(
     "E",
     Command{