Refactor: rewrote Japanese natural language processing code imported from server_editor.py

The logic has not been changed, only renaming, splitting and moving modules on a per-function basis.
Existing code will be left in place for the time being to avoid breaking the training code, which is not subject to refactoring this time.

style_bert_vits2/logging.py

@@ -0,0 +1,15 @@
+from loguru import logger
+
+from style_bert_vits2.utils.stdout_wrapper import SAFE_STDOUT
+
+
+# Remove all default handlers
+logger.remove()
+
+# Add a new handler
+logger.add(
+    SAFE_STDOUT,
+    format = "<g>{time:MM-DD HH:mm:ss}</g> |<lvl>{level:^8}</lvl>| {file}:{line} | {message}",
+    backtrace = True,
+    diagnose = True,
+)