docs: CLI unification release v0.1.0 (M8)

Refresh README and user guide with full M3-M7 CLI surface (gateway token
recovery, mosaic config, 8 sub-package commands, mosaic telemetry, unified
first-run UX). Bump @mosaicstack/mosaic to v0.1.0. CI publish workflow
handles npm publish on merge.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.21",
+  "version": "0.1.0",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/mosaic-stack.git",