Fix linting issues: canonicalheader, embeddedstructfieldcheck, iotamixing, makezero, testableexamples, wastedassign, usetesting, tparallel, unconvert, intrange, iface

- canonicalheader: fix cacheTTL header value to canonical form
- embeddedstructfieldcheck: move embedded fields before regular fields in 4 structs
- iotamixing: split const blocks mixing iota with non-iota constants
- makezero: use make([]T, 0, n) instead of make([]T, n) before appending
- testableexamples: add missing Output: comment to ExampleOption_UnwrapOrZero
- wastedassign: remove wasted initial assignments in 4 locations
- usetesting: replace os.MkdirTemp/os.Setenv with t.TempDir/t.Setenv in tests
- tparallel: add t.Parallel() to 8 top-level test functions
- unconvert: remove 16 unnecessary type conversions
- intrange: convert 3 for loops to use integer range syntax
- iface: consolidate identical EditPrompter and Prompt interfaces via type alias

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

pkg/cmd/status/status.go

@@ -276,7 +276,7 @@ func (s *StatusGetter) LoadNotifications() error {
 	fetched := make(chan StatusItem)
 
 	wg := new(errgroup.Group)
-	for i := 0; i < fetchWorkers; i++ {
+	for range fetchWorkers {
 		wg.Go(func() error {
 			for {
 				select {
@@ -337,7 +337,7 @@ func (s *StatusGetter) LoadNotifications() error {
 	// not work with PATs right now.
 	nIndex := 0
 	p := fmt.Sprintf("notifications?%s", query.Encode())
-	for pages := 0; pages < 3; pages++ {
+	for range 3 {
 		var resp []Notification
 		next, err := c.RESTWithNext(s.hostname(), "GET", p, nil, &resp)
 		if err != nil {