refactor(linkedin)!: rename plugin linkedin-thought-leadership → linkedin-studio (v3.0.0)

BREAKING CHANGE: the marketplace slug, the agent namespace
(linkedin-studio:<agent>), and the runtime state-file path
(~/.claude/linkedin-studio.local.md) all change. Reinstall required;
existing state migrated in place (post metrics, streak, history preserved).
The /linkedin:* commands are unchanged — the command namespace is set
per-command in frontmatter and was always independent of the plugin slug.
Functionality is byte-identical to v2.4.0; this release is pure identity.

- dir + manifests: plugins/linkedin-studio + plugin.json + root marketplace.json
- agent namespace updated in commands/newsletter.md (only functional invoker)
- state path updated in 4 hook scripts + topic-rotation prompt + state template
- catch-all skill dir renamed skills/linkedin-studio (5 functional skills unchanged)
- docs + version bump to 3.0.0 across README badge, CHANGELOG, root README/CLAUDE.md
- historical records (CHANGELOG past entries, docs/ build artifacts,
  config-audit v5.0.0 snapshots) intentionally retain the old slug

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude-plugin/plugin.json

@@ -1,11 +1,11 @@
 {
-  "name": "linkedin-thought-leadership",
-  "version": "2.4.0",
-  "description": "Full-spectrum LinkedIn content engine — feed posts, carousels, video scripts, and long-form newsletter editions — with the January 2026 360Brew algorithm baked in. v2.4 adds Step 5.5 (editorial review) to /linkedin:newsletter: a new editorial-reviewer agent (Opus) judges craft — prose-craft + narrative-architecture — between fact-check (Step 5) and the persona sweep (Step 6), operator-gated via SendUserFile, mirroring the Maskinrommet writing-contract §C2 (pipeline 14→15 phases, agents 15→16). v2.3 added Step 7.5 (visual assets): cover + inline figures or carousel deck, generated and operator-gated BEFORE lock. v2.2 hardened the longform gates: blocking persona hard-fails, post-cutoff fact-check mandate, a Norwegian-chronicle de-AI voice-scrubber, render+annotate operator gates, and STATE.md-reconciled edition state.",
+  "name": "linkedin-studio",
+  "version": "3.0.0",
+  "description": "LinkedIn Studio — full-spectrum LinkedIn content engine: feed posts, carousels, video scripts, and long-form newsletter editions, with the January 2026 360Brew algorithm baked in. v3.0.0 renames the plugin (was `linkedin-thought-leadership`): the slug, agent namespace, and runtime state-file path are now `linkedin-studio` — the `/linkedin:*` commands are unchanged. Breaking: reinstall required and the state file moves to `~/.claude/linkedin-studio.local.md`.",
   "author": {
     "name": "Kjell Tore Guttormsen"
   },
   "license": "MIT",
   "repository": "https://git.fromaitochitta.com/open/ktg-plugin-marketplace",
-  "keywords": ["linkedin", "content-creation", "thought-leadership", "analytics", "360brew"]
+  "keywords": ["linkedin", "content-creation", "newsletter", "analytics", "360brew"]
 }