forgot some files

Author: nohkumado

.gitignore

@@ -0,0 +1,3 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/

bin/tilde_expansion.dart

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+import 'package:tilde_expansion/tilde_expansion.dart' as tilde_expansion;
+
+void main(List<String> arguments) {
+  print(
+      "Hello to convert ~/Documents/test.txt to   ${'~/Documents/test.txt'.expandUser()}");
+}