docs: update AI module README with latest features

- Add comprehensive documentation for the new Query functionality
- Update interface method names from Call to Plan for consistency
- Add OpenAI GPT-4O model support documentation
- Include detailed usage examples for basic and custom schema queries
- Add configuration examples for multiple model services
- Document new features like ResetHistory, Usage statistics, and automatic type conversion
- Expand advanced features section with custom output format examples
- Update all code examples to reflect the latest API changes

The documentation now reflects the current state of the AI module with all three core capabilities:
- Planning (renamed from Call)
- Assertion
- Query (new feature)

All examples and configurations are updated to match the latest implementation.

uixt/ai/planner.go

@@ -14,7 +14,7 @@ import (
 )
 
 type IPlanner interface {
-	Call(ctx context.Context, opts *PlanningOptions) (*PlanningResult, error)
+	Plan(ctx context.Context, opts *PlanningOptions) (*PlanningResult, error)
 }
 
 // PlanningOptions represents the input options for planning
@@ -89,8 +89,8 @@ func (p *Planner) RegisterTools(tools []*schema.ToolInfo) error {
 	return nil
 }
 
-// Call performs UI planning using Vision Language Model
-func (p *Planner) Call(ctx context.Context, opts *PlanningOptions) (result *PlanningResult, err error) {
+// Plan performs UI planning using Vision Language Model
+func (p *Planner) Plan(ctx context.Context, opts *PlanningOptions) (result *PlanningResult, err error) {
 	// validate input parameters
 	if err := validatePlanningInput(opts); err != nil {
 		return nil, errors.Wrap(err, "validate planning parameters failed")