Refactor logger and error handling modules

Moved isTrueFromDotEnv to logger.js and updated its usage. Simplified logger import and instantiation across modules. Added errors.js for centralized error exports. Set default error code in DefaultError. Cleaned up unused imports in utils.js.

errors/DefaultError.js

@@ -1,7 +1,7 @@
 class DefaultError extends Error {
     constructor(code, message, cause, name) {
         super(message)
-        this.code = code
+        this.code = code || 500
         this.name = name || "DefaultError"
         this.cause = cause || "Internal Server Error"
         this.message = message || "Internal Server Error"