initial post box view

Signed-off-by: William Casarin <jb55@jb55.com>

src/draft.rs

@@ -0,0 +1,10 @@
+#[derive(Default)]
+pub struct Draft {
+    pub buffer: String,
+}
+
+impl Draft {
+    pub fn new() -> Self {
+        Draft::default()
+    }
+}