feat: config grouped by area, with per-provider timeouts and an update interval (#60)

Regroups the config, while there are no users to migrate:

- `ui`: icons, sourcesView, collapseGroups, loadDelay, expiryWarningDays
- `values`: revealTimeout, hideOnBlur, clipboardClear
- `storage`: cache, history
- `updates`: autoCheck (was updateCheck), autoCheckInterval (new, 24h by default), updateSources (was releases)
- `providers.timeout` (was timeout), plus `timeout` on azure, databricks and repos overriding it for that provider; `--timeout` still sets them all
- `sharing` (was share), in the config and in a repo's `.lazysecrets.yaml`

docs/config.md and the pages naming these keys are updated.

Reviewed-on: #60
Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>

internal/ui/app/update_test.go

@@ -83,6 +83,12 @@ func TestUpdate(t *testing.T) {
 	if f2.asked != 1 {
 		t.Errorf("asked %d times a day later", f2.asked)
 	}
+	// With autoCheckInterval: 1h, two hours on is long enough.
+	mem.SetUpdateCheck(store.UpdateCheck{At: time.Now().Add(-2 * time.Hour), Tag: "v0.2.0"})
+	newDriverOpts(t, Options{Version: "0.1.1", Updater: f2.updater(), UpdateCheck: true, UpdateEvery: time.Hour, Store: mem})
+	if f2.asked != 2 {
+		t.Errorf("asked %d times, want a look after the hour", f2.asked)
+	}
 }
 
 func TestUpdateAsked(t *testing.T) {