feat(cli): polish command surface (remote group, bare note, note-search dedup, examples)

[olddognewflex]

Closes #61.

CLI surface inconsistencies at the edges (§2.2, §2.6).

1. qi remote status|drain

The cloud-queue verbs were hyphenated top-levels (remote-status / remote-drain) — inconsistent with every other command group. Grouped under a qi remote parent. The old spellings survive as deprecated aliases (built by the same newRemote*Command(cfg, use) builders, so no logic is duplicated) that still run but print a one-line pointer to the grouped form.

2. Bare qi note shows help

It used to silently create an untitled inbox note and open Obsidian — an undocumented, side-effecting surprise where every sibling group shows help. Now it shows help; qi note new is the create path. (Removed the now-dead openURL call from note; openURL itself stays — daily.go uses it.)

3. note search → deprecated

qi note search <q> duplicated qi search <q> --kind note. Kept working but marked Deprecated, pointing at the canonical unified-search path.

4. Cobra Example blocks

Added where the syntax is non-obvious — especially date/repeat on task add / schedule / list, plus search / capture / note new. e.g.:

$ qi task add -h
Examples:
  qi task add "Ship the release" --due 2026-08-01
  qi task add "Water plants" --schedule tomorrow --repeat "every 3 days"
  qi task add "Weekly review" --repeat "every week" --project ops
  qi task add "Send invoice" --client acme --due 2026-08-15

Tests

remote_test.go: the remote group has status/drain; the deprecated aliases carry a pointer; bare qi note is non-runnable (help) and note search is deprecated. Full go test ./..., go vet, go build ./... green; smoke-tested each surface change.

Merge-order note

Touches internal/commands/task.go (Examples) and capture.go. Overlaps #60 and #62 on those files — trivial rebase for whichever merges later.