feat: add okr plugin v1.0.0 — OKR guidance for Norwegian public sector

Expert OKR guidance based on Google/Doerr methodology, adapted for
4-month tertial cycles and Norwegian government accountability.

Components:
- 8 commands (skriv, kvalitet, kaskade, sporing, møter, innføring, governance, oppsett)
- 5 agents (kvalitetssjekker, kaskadebygger, fremdriftssporer, møtefasilitator, styringsrådgiver)
- 3 hooks (UserPromptSubmit context injection, PreCompact state preservation, Stop reminder)
- 15 reference files covering methodology, governance, meetings, antipatterns
- Linear MCP integration for OKR tracking

Previously in ktg-privat, now open-sourced.

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

plugins/okr/.gitignore

@@ -0,0 +1,25 @@
+# Local configuration (contains user-specific settings)
+*.local.md
+okr.local.md
+
+# MCP configuration (may contain API keys)
+.mcp.json
+
+# Secrets
+.env
+*.key
+*.pem
+credentials.*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor files
+*.swp
+*.swo
+*~
+
+# Temporary files
+*.tmp
+*.bak