feat: add context-aware HTTP POST and improve CLI help formatting

- Add context support to HTTP POST requests for improved cancellation and timeout handling
- Fix formatting of usage and commands help text in the CLI output

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

jenkins.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
@@ -34,6 +35,7 @@ func NewJenkins(auth *Auth, url string, insecure bool) *Jenkins {
 	if insecure {
 		client = &http.Client{
 			Transport: &http.Transport{
+				// #nosec G402 -- InsecureSkipVerify is intentionally configurable by user
 				TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
 			},
 		}
@@ -82,7 +84,7 @@ func (jenkins *Jenkins) parseResponse(resp *http.Response, body interface{}) (er
 
 func (jenkins *Jenkins) post(path string, params url.Values, body interface{}) (err error) {
 	requestURL := jenkins.buildURL(path, params)
-	req, err := http.NewRequest("POST", requestURL, nil)
+	req, err := http.NewRequestWithContext(context.Background(), "POST", requestURL, nil)
 	if err != nil {
 		return
 	}

main.go

@@ -79,13 +79,15 @@ NAME:
    {{.Name}} - {{.Usage}}
 
 USAGE:
-   {{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
+   {{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} ` +
+		`{{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
    {{if len .Authors}}
 AUTHOR:
    {{range .Authors}}{{ . }}{{end}}
    {{end}}{{if .Commands}}
 COMMANDS:
-{{range .Commands}}{{if not .HideHelp}}   {{join .Names ", "}}{{ "\t"}}{{.Usage}}{{ "\n" }}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+{{range .Commands}}{{if not .HideHelp}}   {{join .Names ", "}}{{ "\t"}}{{.Usage}}{{ "\n" }}{{end}}{{end}}{{end}}` +
+		`{{if .VisibleFlags}}
 GLOBAL OPTIONS:
    {{range .VisibleFlags}}{{.}}
    {{end}}{{end}}{{if .Copyright }}