build: rebrand output artifacts to Oak and fix macOS QML deployment

- Rename macOS bundle output from Olive.app to Oak.app.
- Rename editor binary to oak-editor and render worker to oak-render-worker.
- Rename crash handler output to oak-crashhandler.
- Update worker lookup, NSIS installer, Linux desktop/AppRun, crashhandler
  symbol paths, and documentation for the new binary names.
- Update CD workflow paths and add -qmldir flags to macdeployqt so QtQuick
  / QML plugins required by KDDockWidgets are bundled, fixing the launch
  crash on macOS.
- Update user-facing GitHub URLs to OakVideoEditorCommunity/oak.

docs/build_macos.md

@@ -146,13 +146,13 @@ The build process may take 10-30 minutes depending on your hardware.
 After successful build, you can run Oak Video Editor:
 
 ```bash
-./build/app/olive-editor
+./build/app/oak-editor
 ```
 
 Or open the app bundle (if generated):
 
 ```bash
-open ./build/app/olive-editor.app
+open ./build/app/Oak.app
 ```
 
 ---
@@ -234,7 +234,7 @@ export CPATH="/opt/homebrew/include:$CPATH"
 To create a distributable `.app` bundle, you may need to use `macdeployqt`:
 
 ```bash
-/opt/homebrew/opt/qt@6/bin/macdeployqt build/app/olive-editor.app
+/opt/homebrew/opt/qt@6/bin/macdeployqt build/app/Oak.app
 ```
 
 This will bundle the required Qt libraries into the app.

docs/zh/build_macos-zh.md

@@ -146,13 +146,13 @@ cmake --build build --config Release
 编译成功后，你可以运行 Oak 视频编辑器：
 
 ```bash
-./build/app/olive-editor
+./build/app/oak-editor
 ```
 
 或者打开应用程序包（如果已生成）：
 
 ```bash
-open ./build/app/olive-editor.app
+open ./build/app/Oak.app
 ```
 
 ---
@@ -234,7 +234,7 @@ export CPATH="/opt/homebrew/include:$CPATH"
 要创建可分发的 `.app` 包，你可能需要使用 `macdeployqt`：
 
 ```bash
-/opt/homebrew/opt/qt@6/bin/macdeployqt build/app/olive-editor.app
+/opt/homebrew/opt/qt@6/bin/macdeployqt build/app/Oak.app
 ```
 
 这会将所需的 Qt 库打包到应用程序中。