Initial commit: two Clojure Android todo apps

Side-by-side comparison of viable Clojure-on-Android approaches:
- todo-expo/: ClojureScript + shadow-cljs + Expo + Reagent + re-frame
- todo-flutter/: ClojureDart + Flutter

Both apps feature: add/remove/check-off todos, SQLite persistence,
categories, priorities, edit support, swipe-to-delete, filtering.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

todo-flutter/deps.edn

@@ -0,0 +1,7 @@
+{:paths ["src"]
+ :deps {tensegritics/clojuredart
+        {:git/url "https://github.com/tensegritics/ClojureDart.git"
+         :sha "0375b3d0e0dfcd5ca5c97f2148124cb7e0d0a7d3"}}
+ :aliases {:cljd {:main-opts ["-m" "cljd.build"]}}
+ :cljd/opts {:kind :flutter
+             :main todo.main}}