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/timeout_test.go

@@ -0,0 +1,25 @@
+package app
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/provider"
+	"git.kebcloud.no/keb/lazysecrets/internal/provider/fake"
+)
+
+// A provider's own timeout applies to it alone.
+func TestTimeoutPerProvider(t *testing.T) {
+	t.Parallel()
+	d := newDriverOpts(t, Options{Timeout: 5 * time.Second, Timeouts: map[provider.Kind]time.Duration{provider.KindAzure: 10 * time.Millisecond}},
+		fake.Azure(300*time.Millisecond), fake.Databricks(300*time.Millisecond))
+	scr := d.screen()
+	if !strings.Contains(scr, "✗ Azure: context deadline exceeded") || !strings.Contains(scr, "Databricks (…)") ||
+		strings.Contains(scr, "Databricks: context deadline") {
+		t.Errorf("want Azure timed out and Databricks still loading:\n%s", scr)
+	}
+	if got := (timeouts{def: time.Minute}).of(provider.KindRepo); got != time.Minute {
+		t.Errorf("no override: %s, want the default", got)
+	}
+}