chore(repo): initialize planarchy workspace

.gitignore

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+# Dependencies
+node_modules/
+.pnpm-store/
+.pnp
+.pnp.js
+
+# Build outputs
+.next/
+dist/
+build/
+.turbo/
+coverage/
+playwright-report/
+test-results/
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.env.*.local
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# Database and local runtime data
+*.db
+*.sqlite
+*.sqlite3
+packages/db/backups/
+vectors.db
+
+# Prisma
+packages/db/prisma/migrations/*
+!packages/db/prisma/migrations/.gitkeep
+
+# Editors and OS files
+.vscode/*
+!.vscode/extensions.json
+!.vscode/settings.json
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# TypeScript
+*.tsbuildinfo
+
+# Local agent and tool state
+.codex/
+.swarm/
+.claude-flow/data/
+.claude-flow/logs/
+**/.claude-flow/data/
+**/.claude-flow/logs/
+**/.claude-flow/sessions/
+
+# Temporary office lock files
+.~lock.*
+
+# Never commit workbook source files
+*.xls
+*.xlsx