Add todos.txt (during initial dev this is just the simplest route)

todos.txt

@@ -0,0 +1,17 @@
+Paul's todo list
+
+- Posts in Thread and Feed view
+  - Like btn
+  - Repost btn
+  - Share btn
+  - Navigate to profile on avi or username click
+- Thread view
+  - Mock API support fetch on thread that's not root
+  - Header (back btn, highlight)
+  - Navigate on post press
+  - View likes list
+  - View reposts list
+  - Reply control
+- Compose post control
+- Navigation
+  - Stack behavior when navigating content