refactor: move MobileAction to option package and update imports

- Move MobileAction struct from uixt package to uixt/option package
- Delete uixt/driver_action.go file as MobileAction is now in option package
- Update all import statements across the codebase to use option.MobileAction
- Update ActionTool interface to use option.MobileAction in ConvertActionToCallToolRequest method
- Maintain backward compatibility while improving package organization
- Clean up code structure by consolidating action-related types in option package

Files affected:
- server/uixt.go: Updated imports and type references
- step.go: Updated imports and ActionResult struct
- step_ui.go: Updated all MobileAction references to option.MobileAction
- uixt/mcp_server.go: Updated ActionTool interface and removed detailed comments
- uixt/mcp_server_test.go: Updated all test cases to use option.MobileAction
- uixt/mcp_tools_*.go: Updated ConvertActionToCallToolRequest method signatures
- uixt/option/action.go: Added MobileAction struct definition
- uixt/sdk.go: Updated ExecuteAction method signature

step.go

@@ -1,7 +1,7 @@
 package hrp
 
 import (
-	"github.com/httprunner/httprunner/v5/uixt"
+	"github.com/httprunner/httprunner/v5/uixt/option"
 	"github.com/httprunner/httprunner/v5/uixt/types"
 )
 
@@ -57,10 +57,10 @@ type TStep struct {
 
 // one step contains one or multiple actions
 type ActionResult struct {
-	uixt.MobileAction `json:",inline"`
-	StartTime         int64 `json:"start_time"` // action start time
-	Elapsed           int64 `json:"elapsed_ms"` // action elapsed time(ms)
-	Error             error `json:"error"`      // action execution result
+	option.MobileAction `json:",inline"`
+	StartTime           int64 `json:"start_time"` // action start time
+	Elapsed             int64 `json:"elapsed_ms"` // action elapsed time(ms)
+	Error               error `json:"error"`      // action execution result
 }
 
 // one testcase contains one or multiple steps