ENH: enable logging for commandline use

Summary

Setup Logging in case of commandline use

Test Environment

Minimal setup:

mkdir dummy_path
mkdir dummy_shared
touch dummy_cfood.yml

# For terminal output:
caosdb-crawler dummy_cfood.yml dummy_path
SHARED_DIR=dummy_shared caosdb-crawler dummy_cfood.yml dummy_path

I added one debug info line for simple testing:

diff --git a/src/caoscrawler/crawl.py b/src/caoscrawler/crawl.py
index 24a172e..d1def02 100644
--- a/src/caoscrawler/crawl.py
+++ b/src/caoscrawler/crawl.py
@@ -1562,6 +1562,8 @@ def crawler_main(crawled_directory_path: str,
             handler.setLevel(logging.DEBUG if debug else logging.INFO)
             root_logger.addHandler(handler)
 
+        logger.info("OK")
+
         debug_tree = DebugTree()
         crawled_data = scan_directory(
             crawled_directory_path, cfood_file_name, restricted_path, debug_tree=debug_tree)

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