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.

.claude-plugin/marketplace.json

@@ -49,6 +49,11 @@
       "name": "okr",
       "source": "./plugins/okr",
       "description": "Expert OKR guidance for Norwegian public sector. Write, review, cascade, track and govern OKR based on Google/Doerr methodology adapted for 4-month tertial cycles."
+    },
+    {
+      "name": "human-friendly-style",
+      "source": "./plugins/human-friendly-style",
+      "description": "Shared Claude Code output style for the ktg-plugin-marketplace. Plain-language tone — explains what and why, hides paths/JSON/stack traces by default, matches the user's language."
     }
   ]
 }