Rearrange project files.

include/internal/vase/iterators/line.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "../shard.h"
+#include "pch.h"
+#include "petal.h"
+
+struct LineIterator {
+  PetalIterator it;
+  const char *chunk;
+  uint64_t len;
+  Direction dir;
+  uint64_t current_offset = 0;
+  uint64_t last_line_offset = 0;
+
+  LineIterator(Shard *root, uint64_t line_num, Direction dir);
+  ~LineIterator() = default;
+
+  bool next(std::string *line);
+  uint64_t byte_offset();
+};