[CLI] implement forgejo-cli actions register

(cherry picked from commit 2f95143000)

modules/private/forgejo_actions.go

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+
+package private
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/modules/setting"
+)
+
+type ActionsRunnerRegisterRequest struct {
+	Token   string
+	Scope   string
+	Labels  []string
+	Name    string
+	Version string
+}
+
+func ActionsRunnerRegister(ctx context.Context, token, scope string, labels []string, name, version string) (string, ResponseExtra) {
+	reqURL := setting.LocalURL + "api/internal/actions/register"
+
+	req := newInternalRequest(ctx, reqURL, "POST", ActionsRunnerRegisterRequest{
+		Token:   token,
+		Scope:   scope,
+		Labels:  labels,
+		Name:    name,
+		Version: version,
+	})
+
+	resp, extra := requestJSONResp(req, &responseText{})
+	return resp.Text, extra
+}