[feat] release: interactive release client, drop the CI linked-deps guard

`pnpm run release` (scripts/release.mjs, zx + enquirer + commander) replaces
the hand sequence of bump, changelog, gate, tag, push. It picks packages from a
list annotated with what npmjs already has, computes versions from the manifest,
collects notes in $EDITOR seeded with the commits since the package's last tag,
and prepends them to CHANGELOG.md in the format release.yml's parser expects.

The gate (lint:ci -> typecheck -> test:coverage -> build -> verify-pack) runs
against the bumped tree *before* the commit, so a failure leaves nothing to
unpick -- it offers to restore instead. Tags go out dependency-first, and each
version is polled on npmjs before the next tag is pushed.

That polling is what lets release.yml lose its `check linked deps are released`
step: the ordering is now enforced before CI ever sees a tag, rather than after.
linked-deps.mjs stays as a hand-check. The accepted cost is that a tag pushed
some other way is no longer caught.

Three things found by running it rather than reading it:

- Tags are annotated (`-a -m`). A lightweight tag is rejected outright under
  tag.forceSignAnnotated, which is set on the machine this was written on.
- pnpm 11 forwards the `--` in `pnpm run release -- --dry-run` literally, and
  commander reads a bare `--` as "the rest are positionals". The script takes no
  positionals, so it strips it and both spellings work.
- Prompts refuse with a message naming the flag that avoids them when stdin is
  not a TTY, instead of hanging as an unsettled top-level await.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DCzYTAm9QUhvLNr2EpdagJ

pnpm-lock.yaml

@@ -26,12 +26,24 @@ importers:
       '@types/node':
         specifier: ^26.1.1
         version: 26.1.1
+      commander:
+        specifier: ^15.0.0
+        version: 15.0.0
+      enquirer:
+        specifier: ^2.4.1
+        version: 2.4.1
+      semver:
+        specifier: ^7.8.5
+        version: 7.8.5
       simple-git-hooks:
         specifier: ^2.13.1
         version: 2.13.1
       typescript:
         specifier: ^7.0.2
         version: 7.0.2
+      zx:
+        specifier: ^8.8.5
+        version: 8.8.5
 
   packages/keyman:
     dependencies: