refactor: 重命名项目为 tauri-shell 并更新相关配置

- 更新项目根目录名称为 tauri-shell 并调整相关结构说明
- 移除旧的 tauri-demo 包并添加新的 tauri-shell 包以支持 shell 功能
- 修改项目名称为 tauri-shell
- 修改应用名称和标识符为 tauri-shell

Cargo.lock

@@ -3605,18 +3605,6 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "tauri-demo"
-version = "0.1.0"
-dependencies = [
- "serde",
- "tauri",
- "tauri-build",
- "tauri-plugin-opener",
- "tauri-plugin-shell",
- "tokio",
-]
-
 [[package]]
 name = "tauri-macros"
 version = "2.5.2"
@@ -3743,6 +3731,18 @@ dependencies = [
  "wry",
 ]
 
+[[package]]
+name = "tauri-shell"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "tauri",
+ "tauri-build",
+ "tauri-plugin-opener",
+ "tauri-plugin-shell",
+ "tokio",
+]
+
 [[package]]
 name = "tauri-utils"
 version = "2.8.1"