chore(tools): 根目录散落工具脚本归位 tools/ 目录

- find/listdir/r/sound/SendWX 及 WARN.mp3 移入 tools/（sound.py 相对路径同目录保持可用）
- Version 死代码（import 自增 VER）归档 tools/Version
- Main.py（生产入口候选）与 TODO 保留根目录待确认

gvsds/apps/core/views.py

@@ -54,9 +54,9 @@ SUBDOMAIN_CONFIG = {
     'history': {'dir': 'history', 'root_is_index': True},
     'cdn': {'dir': 'cdn', 'root_is_index': False, 'root_text': 'GVSDS CDN'},
     'yc8z': {'dir': 'yc8z', 'root_is_index': True},
-    'omc': {'dir': 'omc', 'root_is_index': True},
+    'omc': {'dir': 'OMC', 'root_is_index': True},
     'sve': {'dir': 'SVE', 'root_is_index': True},
-    'tailwind': {'dir': 'Tailwindcss', 'root_is_index': False, 'root_redirect': '/3.4.17'},
+    'tailwind': {'dir': 'tailwindcss', 'root_is_index': False, 'root_redirect': '/3.4.17'},
     'nanjingmassacre': {'dir': 'NanjingMassacre', 'root_is_index': True},
     '3c': {'dir': 'CreateECentralCourt', 'root_is_index': True},
     'vu': {'dir': None, 'root_is_index': False},