使用PySide6-Fluent-Widgets重构整套UI

添加任务列表组件并优化视频加载逻辑
支持可视化显示字幕区域
整理所有模型, 分别为STTN智能擦除, STTN字幕检测, LAMA, ProPainter, OpenCV
提高处理性能
新增CPU运行模式并优化多语言支持
修复Propainter模式部分视频报错

本次提交新增了CPU运行模式，适用于无GPU加速的场景。同时，优化了多语言支持，新增了日语、韩语、越南语等语言配置文件，并更新了README文档以反映新的运行模式和多语言支持。此外，修复了部分代码逻辑，提升了系统的稳定性和兼容性。

backend/tools/concurrent/task.py

@@ -0,0 +1,48 @@
+import functools
+from typing import Optional
+
+from PySide6.QtCore import QObject, Signal, QRunnable
+
+from .future import Future
+
+
+class WorkerSignal(QObject):
+    finished = Signal(object)
+
+
+class BaseTask(QRunnable):
+    def __init__(self, _id: int, future: Future):
+        super().__init__()
+        self._signal = WorkerSignal()  # Signal(object)
+        self._future = future
+        self._id = _id
+        self._exception: Optional[BaseException] = None
+        self._semaphore = future.semaphore
+
+    @property
+    def finished(self):
+        return self._signal.finished
+
+    @property
+    def signal(self):
+        return self._signal
+
+    def _taskDone(self, **data):
+        for d in data.items():
+            self._future.setExtra(*d)
+        self._signal.finished.emit(self._future)
+        self._semaphore.release(1)
+
+
+class Task(BaseTask):
+    def __init__(self, _id: int, future: Future, target: functools.partial, args, kwargs):
+        super().__init__(_id=_id, future=future)
+        self._target = target
+        self._kwargs = kwargs
+        self._args = args
+
+    def run(self) -> None:
+        try:
+            self._taskDone(result=self._target(*self._args, **self._kwargs))
+        except Exception as exception:
+            self._taskDone(exception=exception)