Support CI_STEP_NAME and CI_STEP_TYPE (#88)

needs https://github.com/woodpecker-ci/woodpecker/pull/4290 (woodpecker >= v3.15.0)

Reviewed-on: https://codeberg.org/woodpecker-plugins/go-plugin/pulls/88
Reviewed-by: qwerty287 <qwerty287@noreply.codeberg.org>

step.go

@@ -22,13 +22,40 @@ import (
 
 // Step defines runtime metadata for a step.
 type Step struct {
+	Name     string    `json:"name,omitempty"`
+	Type     StepType  `json:"type,omitempty"`
 	Number   int       `json:"number,omitempty"`
 	Started  time.Time `json:"started,omitempty"`
 	Finished time.Time `json:"finished,omitempty"`
 }
 
+// StepType identifies the type of step.
+type StepType string
+
+const (
+	StepTypeClone    StepType = "clone"
+	StepTypeService  StepType = "service"
+	StepTypePlugin   StepType = "plugin"
+	StepTypeCommands StepType = "commands"
+	StepTypeCache    StepType = "cache"
+)
+
 func stepFlags() []cli.Flag {
 	return []cli.Flag{
+		&cli.StringFlag{
+			Name:  "step.name",
+			Usage: "step name",
+			Sources: cli.EnvVars(
+				"CI_STEP_NAME",
+			),
+		},
+		&cli.StringFlag{
+			Name:  "step.type",
+			Usage: "step type",
+			Sources: cli.EnvVars(
+				"CI_STEP_TYPE",
+			),
+		},
 		&cli.IntFlag{
 			Name:  "step.number",
 			Usage: "step number",
@@ -56,6 +83,8 @@ func stepFlags() []cli.Flag {
 
 func stepFromContext(c *cli.Command) Step {
 	return Step{
+		Name:     c.String("step.name"),
+		Type:     StepType(c.String("step.type")),
 		Number:   c.Int("step.number"),
 		Started:  time.Unix(c.Int64("step.started"), 0),
 		Finished: time.Unix(c.Int64("step.finished"), 0),