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/provider/fake/seed.go

@@ -0,0 +1,65 @@
+package fake
+
+import (
+	"cmp"
+	"strings"
+	"time"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/store"
+)
+
+// Seed stars, notes and uses a few of the demo's secrets, so --demo
+// shows Favourites (F), Recent (R), notes, and stars in lazysecrets list. alice and
+// admin are the two Azure accounts' provider IDs.
+func Seed(st *store.Store, alice, admin string) {
+	type item struct {
+		link, account, source string
+		name                  string // else the link's last part
+		note                  string
+		path                  []string
+		star                  bool
+		uses                  int
+		ago                   time.Duration
+	}
+	const azure, dbx = "lazysecrets://azure/", "lazysecrets://databricks/adb-1111111111111111.11.azuredatabricks.net/"
+	for _, it := range []item{
+		{link: azure + "kv-app-prod.vault.azure.net/secrets/db-password", account: alice, source: "sub-prod",
+			path: []string{"platform-prod", "kv-app-prod"}, star: true, uses: 12, ago: 20 * time.Minute,
+			note: "rotated by the data team each quarter"},
+		{link: azure + "kv-app-prod.vault.azure.net/secrets/api-key", account: alice, source: "sub-prod",
+			path: []string{"platform-prod", "kv-app-prod"}, uses: 4, ago: 2 * time.Hour},
+		{link: azure + "kv-breakglass.vault.azure.net/secrets/emergency-admin", account: admin, source: "sub-prod",
+			path: []string{"platform-prod", "kv-breakglass"}, star: true, note: "incidents only: tell #ops when used"},
+		{link: azure + "kv-shared-prod.vault.azure.net/secrets/smtp-password", account: alice, source: "sub-prod",
+			path: []string{"platform-prod", "kv-shared-prod"}, uses: 2, ago: 26 * time.Hour},
+		{link: azure + "kv-app-prod.vault.azure.net/secrets/smtp-password", account: alice, source: "sub-prod",
+			path: []string{"platform-prod", "kv-app-prod"}, note: "migrated to Microsoft Graph sendMail; delete after Q4"},
+		{link: dbx + "app/storage-key", account: "Databricks", source: "dbx-prod",
+			path: []string{"prod", "app"}, star: true, uses: 3, ago: 5 * time.Hour},
+		// A subscription, for both accounts, and a repo's file.
+		{link: azure + "subscriptions/sub-prod", account: alice, source: "sub-prod",
+			name: "platform-prod", star: true},
+		{link: azure + "subscriptions/sub-prod", account: admin, source: "sub-prod",
+			name: "platform-prod", star: true},
+		{link: "lazysecrets://repo/github.com%2Facme%2Flazysecrets-demo/deploy%2Fprod%2Fsecrets.yaml", account: "Repos",
+			source: "/home/dev/git/lazysecrets-demo", name: "deploy/prod/secrets.yaml",
+			path: []string{"lazysecrets-demo"}, star: true},
+	} {
+		context := func(n *store.Node) {
+			n.Name = cmp.Or(it.name, it.link[strings.LastIndex(it.link, "/")+1:])
+			n.Path, n.Source, n.Account = it.path, it.source, it.account
+		}
+		if it.star || it.note != "" {
+			_ = st.Update(it.link, func(n *store.Node) {
+				context(n)
+				if it.star {
+					n.ToggleStar(it.account)
+				}
+				n.Note = it.note
+			})
+		}
+		for range it.uses {
+			_ = st.Use(it.link, time.Now().Add(-it.ago), context)
+		}
+	}
+}