feat(human-friendly-style): add shared output style plugin v1.0.0 [skip-docs]

New plugin shipping a single Claude Code output style for consistent,
plain-language tone across all marketplace plugins. Auto-discovered from
the plugin's output-styles/ directory per Anthropic's documented plugin
contract.

Style instructs Claude to explain what and why (not how), hide noise
(paths, raw commands, JSON, stack traces) by default, match the user's
language, and stay honest about uncertainty. Keeps Claude Code's default
coding instructions intact via keep-coding-instructions: true.

- plugins/human-friendly-style/output-styles/human-friendly.md (style)
- plugins/human-friendly-style/.claude-plugin/plugin.json (manifest)
- plugins/human-friendly-style/{README,CLAUDE,CHANGELOG,LICENSE}
- .claude-plugin/marketplace.json: registered as 9th plugin
- README.md (root): added section between OKR and Shared infrastructure

[skip-docs]: doc-trippel covered (plugin README, plugin CLAUDE, root
README). Root CLAUDE.md update deferred to avoid conflict with concurrent
ultraplan-local + ms-ai-architect work touching the same Repo-struktur
block.

plugins/human-friendly-style/.claude-plugin/plugin.json

@@ -0,0 +1,18 @@
+{
+  "name": "human-friendly-style",
+  "version": "1.0.0",
+  "description": "Shared output style for ktg-plugin-marketplace plugins. Activates a clear, plain-language tone that hides paths, raw commands, JSON, and stack traces by default.",
+  "author": {
+    "name": "Kjell Tore Guttormsen"
+  },
+  "auto_discover": true,
+  "license": "MIT",
+  "repository": "https://git.fromaitochitta.com/open/ktg-plugin-marketplace",
+  "keywords": [
+    "output-style",
+    "communication",
+    "plain-language",
+    "shared",
+    "ktg-plugin-marketplace"
+  ]
+}