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/constants.py

@@ -0,0 +1,32 @@
+from enum import Enum
+from pathlib import Path
+
+
+# Style-Bert-VITS2 のバージョン
+VERSION = "2.3.1"
+
+# ユーザー辞書ディレクトリ
+USER_DICT_DIR = Path("dict_data")
+
+# Gradio のテーマ
+## Built-in theme: "default", "base", "monochrome", "soft", "glass"
+## See https://huggingface.co/spaces/gradio/theme-gallery for more themes
+GRADIO_THEME = "NoCrypt/miku"
+
+# 利用可能な言語
+class Languages(str, Enum):
+    JP = "JP"
+    EN = "EN"
+    ZH = "ZH"
+
+# 推論パラメータのデフォルト値
+DEFAULT_STYLE = "Neutral"
+DEFAULT_STYLE_WEIGHT = 5.0
+DEFAULT_SDP_RATIO = 0.2
+DEFAULT_NOISE = 0.6
+DEFAULT_NOISEW = 0.8
+DEFAULT_LENGTH = 1.0
+DEFAULT_LINE_SPLIT = True
+DEFAULT_SPLIT_INTERVAL = 0.5
+DEFAULT_ASSIST_TEXT_WEIGHT = 0.7
+DEFAULT_ASSIST_TEXT_WEIGHT = 1.0