Added scaffoded project

src/models.rs

@@ -0,0 +1,28 @@
+#[derive(Debug, Clone, Copy)]
+pub struct PendingRange {
+    pub chunk_start: usize,
+    pub chunk_end: usize,
+    pub start: usize,
+    pub end: usize,
+}
+
+impl PendingRange {
+    pub fn len(self) -> usize {
+        self.end.saturating_sub(self.start)
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct ChunkRecord {
+    pub chunk_start: usize,
+    pub chunk_end: usize,
+    pub tested_count: usize,
+    pub open_count: usize,
+    pub is_complete: bool,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct ScanTotals {
+    pub tested: usize,
+    pub open: usize,
+}