creating first structure of cinema backend server

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/lib/feature/poster/models/poster.enums.dart

@@ -0,0 +1,16 @@
+enum PosterOrientation {
+  horizontal,
+  vertical,
+}
+
+enum PosterFormat {
+  png,
+  jpeg,
+  bmp,
+}
+
+enum PosterOutput {
+  image,
+  lvgl,
+  lvglBinary,
+}