Migrate from Boards to Variant, remove hardcoded versions, remove customn directories and some cleanup

mcu-desk-lamp.yaml

@@ -11,17 +11,9 @@ esphome:
   comment: ${comment}
 
 esp32:
-  board: m5stack-atom
+  variant: esp32
   framework:
     type: esp-idf
-    version: 5.3.2
-    platform_version: 53.03.11
-
-# external_components:
-#   - source: github://pr#7958
-#     refresh: 0s
-#     components:
-#       - rotary_encoder
 
 packages:
   common: !include common/common.yaml