chore: initial project setup with MCP server configs

- Add MCP servers for Redmine, Jenkins, Gitea, Obsidian
- Add setup_mcp.sh to generate .mcp.json from .env (no secrets in VCS)
- Add .env.example with required variable names for team onboarding
- Add .gitignore to exclude secrets (.env, .mcp.json, settings.local.json)
- Fix obsidian_mcp_server.py stdio_server async context manager usage

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

.gitignore

@@ -0,0 +1,32 @@
+# 시크릿 / 환경 변수
+.env
+.env.local
+.env.*.local
+
+# MCP 설정 (시크릿 포함 → setup_mcp.sh로 생성)
+.mcp.json
+.claude/settings.local.json
+
+# 구버전 MCP 등록 스크립트 (시크릿 하드코딩 → setup_mcp.sh로 대체)
+add_jenkins_mcp.sh
+add_redmine_mcp.sh
+add_gittea_mcp.sh
+
+# Node.js
+node_modules/
+package-lock.json
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+.venv/
+venv/
+
+# macOS
+.DS_Store
+
+# 에디터
+.idea/
+.vscode/
+*.swp