chore(lvconf_gen): generate empty lv_conf.h if it doesn't exist (#8885)

scripts/build_html_examples.sh

@@ -30,7 +30,6 @@ cd ..
 # Generate lv_conf
 LV_CONF_PATH=`pwd`/lvgl/configs/ci/docs/lv_conf_docs.h
 
-cp lvgl/lv_conf_template.h $LV_CONF_PATH
 python ./lvgl/scripts/generate_lv_conf.py \
   --template lvgl/lv_conf_template.h \
   --config $LV_CONF_PATH \

scripts/generate_lv_conf.py

@@ -3,6 +3,7 @@
 import os
 import re
 import argparse
+from pathlib import Path
 
 DIR_SCRIPTS = os.path.dirname(__file__)
 REPO_ROOT = os.path.join(DIR_SCRIPTS, "..")
@@ -48,7 +49,8 @@ def get_args():
     if not os.path.exists(args.template):
         fatal(f"Template file not found at {args.template}")
     if not os.path.exists(args.config):
-        fatal(f"User config file not found at {args.config}")
+        print(f"{args.config} not found. Generating it")
+        Path(args.config).touch()
     if not os.path.exists(args.defaults):
         fatal(f"User defaults not found at {args.defaults}")