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/sharefiles.go

@@ -59,7 +59,7 @@ func (m *Model) shareFiles(src provider.Source, cs []provider.Container) tea.Cmd
 		m.flash = warning("these files can't be shared")
 		return nil
 	}
-	general, timeout := m.shareKey, m.timeout
+	general, timeout := m.shareKey, m.timeout.of(src.Kind)
 	m.flash = flash{text: "reading the files…"}
 	return func() tea.Msg {
 		ctx, cancel := context.WithTimeout(context.Background(), timeout)
@@ -216,7 +216,7 @@ func (m *Model) handleSealed(msg sealedMsg) tea.Cmd {
 func (m *Model) keyReader() func(ref.Ref) (provider.SecretValue, string, error) {
 	providers, st, timeout := m.providers, m.store, m.timeout
 	return func(key ref.Ref) (provider.SecretValue, string, error) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		ctx, cancel := context.WithTimeout(context.Background(), timeout.of(key.Kind))
 		defer cancel()
 		k := key
 		k.Version = ""
@@ -258,7 +258,7 @@ func (m *Model) offerShare(r ref.Ref) tea.Cmd {
 // openShare reads the key, decrypts the files and finds the repo's clone.
 func (m *Model) openShare(s share.Sealed) tea.Cmd {
 	read := m.keyReader()
-	providers, timeout := m.providers, m.timeout
+	providers, timeout := m.providers, m.timeout.of(provider.KindRepo)
 	m.flash = flash{text: "decrypting with " + s.Key.Name + "…"}
 	return func() tea.Msg {
 		msg := shareOpenedMsg{sealed: s}