refactor "--version" to use "pathlib" instead of "os"

freqtrade/__init__.py

@@ -2,10 +2,10 @@
 __version__ = '2023.1.dev'
 
 if 'dev' in __version__:
+    from pathlib import Path
     try:
-        import os
         import subprocess
-        freqtrade_basedir = os.path.dirname(os.path.abspath(__file__))
+        freqtrade_basedir = Path(__file__).parent
 
         __version__ = __version__ + '-' + subprocess.check_output(
             ['git', 'log', '--format="%h"', '-n 1'],
@@ -15,7 +15,6 @@ if 'dev' in __version__:
         # git not available, ignore
         try:
             # Try Fallback to freqtrade_commit file (created by CI while building docker image)
-            from pathlib import Path
             versionfile = Path('./freqtrade_commit')
             if versionfile.is_file():
                 __version__ = f"docker-{__version__}-{versionfile.read_text()[:8]}"