chore(cli): release 1.0.0 — out of alpha

Promote CLI from 1.0.0-alpha.42 to stable 1.0.0 so
`npm i -g claudemesh-cli` installs the current release without
needing the @alpha dist-tag.

Both dist-tags now point at 1.0.0 — `@alpha` kept as an alias for
continuity so existing docs, install scripts, and scheduled upgrade
commands keep working.

upgrade + doctor commands updated to prefer the `latest` dist-tag
(falling back to `alpha`) and to suggest `npm i -g claudemesh-cli`
without the @alpha suffix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudemesh-cli",
-  "version": "1.0.0-alpha.42",
+  "version": "1.0.0",
   "description": "Peer mesh for Claude Code sessions — CLI + MCP server.",
   "keywords": [
     "claude-code",