Add configurable log level for Python and JS modules

Introduced LOG_LEVEL configuration in both Python and JavaScript to control logging verbosity. Updated logger initialization in canvas_node.py and LoggerUtils.js to use the new LOG_LEVEL from config files.

js/config.js

@@ -0,0 +1,3 @@
+// Log level for development.
+// Possible values: 'DEBUG', 'INFO', 'WARN', 'ERROR', 'NONE'
+export const LOG_LEVEL = 'NONE';