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>

.env.example

@@ -0,0 +1,25 @@
+# =============================================================
+# 팀원별 환경 변수 설정 파일
+# 사용법:
+#   cp .env.example .env
+#   .env에 본인 값 입력 후 저장
+#   ./setup_mcp.sh 실행 → Claude Code 재시작
+#
+# .env는 절대 Git에 커밋하지 마세요!
+# =============================================================
+
+# Redmine
+REDMINE_URL=https://redmine.cloud-handson.com
+REDMINE_API_KEY=your_redmine_api_key
+
+# Jenkins
+JENKINS_URL=https://jenkins.cloud-handson.com
+JENKINS_USER=your_jenkins_username
+JENKINS_TOKEN=your_jenkins_api_token
+
+# Gitea  (URL은 /api/v1 포함)
+GITEA_API_URL=https://gittea.cloud-handson.com/api/v1
+GITEA_TOKEN=your_gitea_access_token
+
+# Obsidian Vault (각자 로컬 경로에 맞게 수정)
+OBSIDIAN_VAULT=/Users/your_username/Documents/Obsidian Vault