feat: lazysecrets list prints everything lazysecrets can find, for fzf and editor pickers (#70)

`lazysecrets list` prints every source, vault and secret lazysecrets can find, one per line, for fzf, editor pickers and scripts: what Go to searches, without the TUI. What's cached prints at once; what's missing or older than `--max-age` loads in the background and streams in. It stops when the reader goes (a pick in fzf), saving what it loaded.

- Text: kind, mark (✗/⚠, ★, ◷ and the provider icon), name, status (why it couldn't be read, or expired / expires in 12d), note, account and link, tab-separated; kind first and account and link last, so new fields go between. Coloured from the theme; `--color never`, `--icons=false`, `--stars=false`, `--recent`, `--notes=false`, `--expiry=false`.
- `--format json`: an object per line, with starred, recent, lastUsed and uses, expires, enabled, note, reference and url too.
- `--kind` lists only some kinds, and doesn't load lists only other kinds need; `--cached` loads nothing.
- `lazysecrets open --action go|copy|show` skips the "what to do" menu and ends in the list, like Go to; `open` and `get` take `--account`, the account list printed, rather than asking which.
- The cache file moved to `internal/cachefile`: saves merge with the file under a lock, so list and the TUI don't undo each other.
- `ui.recentIcon` marks items used lately with ◷ in the TUI's lists too; Recent now means the last 90 days.
- --demo has stars, notes, recent use, and expired, expiring and disabled secrets.
- docs/integration.md documents get, list and an fzf picker; docs/links.md is docs/sharing.md.

Reviewed-on: #70
Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>

internal/ui/app/persist_test.go

@@ -1,12 +1,14 @@
 package app
 
 import (
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 	"time"
 
+	"git.kebcloud.no/keb/lazysecrets/internal/cachefile"
 	"git.kebcloud.no/keb/lazysecrets/internal/provider"
 	"git.kebcloud.no/keb/lazysecrets/internal/provider/fake"
 	"git.kebcloud.no/keb/lazysecrets/internal/ref"
@@ -80,15 +82,16 @@ func TestCacheFileDropsOldAndSignedOut(t *testing.T) {
 	file := filepath.Join(t.TempDir(), "cache.json")
 	az := fake.Azure(0)
 	now := time.Now()
-	f := cacheFile{
-		Version: cacheFileVersion,
-		Containers: map[string]stamped[[]provider.Container]{
-			az.ID() + "|recent":     {now.Add(-time.Hour), []provider.Container{{Name: "kv-recent"}}},
-			az.ID() + "|old":        {now.Add(-cacheMaxAge - time.Hour), []provider.Container{{Name: "kv-old"}}},
-			"Azure:gone@x/t|recent": {now, []provider.Container{{Name: "kv-gone"}}},
+	f := cachefile.File{
+		Version: cachefile.Version,
+		Containers: map[string]cachefile.Stamped[[]provider.Container]{
+			az.ID() + "|recent":     {At: now.Add(-time.Hour), Value: []provider.Container{{Name: "kv-recent"}}},
+			az.ID() + "|old":        {At: now.Add(-cachefile.MaxAge - time.Hour), Value: []provider.Container{{Name: "kv-old"}}},
+			"Azure:gone@x/t|recent": {At: now, Value: []provider.Container{{Name: "kv-gone"}}},
 		},
 	}
-	if err := writeCacheFile(file, f); err != nil {
+	b, _ := json.Marshal(f) // as an older lazysecrets left it
+	if err := os.WriteFile(file, b, 0o600); err != nil {
 		t.Fatal(err)
 	}
 	d := newDriverOpts(t, Options{CacheFile: file}, az)
@@ -97,7 +100,7 @@ func TestCacheFileDropsOldAndSignedOut(t *testing.T) {
 		t.Error("dropped a recent entry")
 	}
 	if _, ok := c[az.ID()+"|old"]; ok {
-		t.Error("kept an entry older than cacheMaxAge")
+		t.Error("kept an entry older than cachefile.MaxAge")
 	}
 	if _, ok := c["Azure:gone@x/t|recent"]; ok {
 		t.Error("kept an entry of an account that isn't signed in")