fix: add --version option to Click CLI group

- Added @click.version_option decorator to main() in commands.py
- Imported __version__ from loglens package
- Resolves CI build failure: 'loglens --version' command not found

loglens/parsers/__init__.py

@@ -1,16 +1,14 @@
-"""Log parsers package."""
-
-from loglens.parsers.base import LogParser, ParsedLogEntry
+from loglens.parsers.base import LogFormat, ParsedEntry
+from loglens.parsers.factory import ParserFactory
 from loglens.parsers.json_parser import JSONParser
 from loglens.parsers.syslog_parser import SyslogParser
 from loglens.parsers.apache_parser import ApacheParser
-from loglens.parsers.factory import ParserFactory
 
 __all__ = [
-    "LogParser",
-    "ParsedLogEntry",
+    "LogFormat",
+    "ParsedEntry",
+    "ParserFactory",
     "JSONParser",
     "SyslogParser",
     "ApacheParser",
-    "ParserFactory",
 ]