Add folder mapping file

videos/folder_mapping.txt

@@ -0,0 +1,32 @@
+# NFC Folder Mapping File for Sequential Video Playback
+# Format: NFC_ID, Folder_Name
+#
+# Instructions:
+# 1. Each line maps an NFC tag to a FOLDER of videos
+# 2. Videos in the folder will play in sequential order
+# 3. Each time you scan the tag, it plays the NEXT video in sequence
+# 4. Folders must be in: videos/groupvideos/
+#
+# Example folder structure:
+#   videos/groupvideos/LOTR/01_fellowship.mp4
+#   videos/groupvideos/LOTR/02_towers.mp4
+#   videos/groupvideos/LOTR/03_return.mp4
+#   videos/groupvideos/Avengers/01_avengers.mp4
+#   videos/groupvideos/Avengers/02_ultron.mp4
+#
+# Example mappings:
+# 11111111,LOTR
+# 22222222,Avengers
+# 33333333,Jurassic
+# 44444444,StarWars
+#
+# Tips:
+# - Folder names are case-sensitive
+# - Videos play in alphabetical order (name your files accordingly)
+# - Use numbers/prefixes to control order: 01_intro.mp4, 02_main.mp4, etc.
+# - Each scan advances to the next video, then loops back to start
+# - Current position is saved in folder_state.json
+# - Use "Reset Folder Sequences" button in debug console to restart all sequences
+#
+# Your folder mappings below:
+