feat: remove unused plugin version comparison and types, refactor proxy server to support authentication

- Deleted version comparison logic from `pkg/plugin/sign/version.go`.
- Removed unused types and constants from `pkg/plugin/types.go`.
- Updated `pkg/protocol/message.go` to remove plugin-related message types.
- Enhanced `pkg/proxy/http.go` and `pkg/proxy/socks5.go` to include username/password authentication for HTTP and SOCKS5 proxies.
- Modified `pkg/proxy/server.go` to pass authentication parameters to server constructors.
- Added new API endpoint to generate installation commands with a token for clients.
- Created database functions to manage installation tokens in `internal/server/db/install_token.go`.
- Implemented the installation command generation logic in `internal/server/router/handler/install.go`.
- Updated web frontend to support installation command generation and display in `web/src/views/ClientsView.vue`.

internal/server/router/handler/config.go

@@ -47,9 +47,6 @@ func (h *ConfigHandler) Get(c *gin.Context) {
 			Username: cfg.Server.Web.Username,
 			Password: "****",
 		},
-		PluginStore: dto.PluginStoreConfigInfo{
-			URL: cfg.Server.PluginStore.URL,
-		},
 	}
 
 	Success(c, resp)
@@ -103,11 +100,6 @@ func (h *ConfigHandler) Update(c *gin.Context) {
 		cfg.Server.Web.Password = req.Web.Password
 	}
 
-	// 更新 PluginStore 配置
-	if req.PluginStore != nil {
-		cfg.Server.PluginStore.URL = req.PluginStore.URL
-	}
-
 	if err := h.app.SaveConfig(); err != nil {
 		InternalError(c, err.Error())
 		return