feat: add root configuration files for mono-repo setup

Add environment template, git ignore rules, and Go workspace
configuration to support mono-repo development workflow.

- .env.example: Environment variables template for all services
- .gitignore: Git ignore rules for Go, Docker, Terraform, Ansible
- go.work: Go workspace file for multi-module support

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

.gitignore

@@ -0,0 +1,76 @@
+# Binaries
+bin/
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Go workspace
+go.sum
+*.test
+*.out
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Logs
+logs/
+*.log
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Terraform
+infrastructure/terraform/**/.terraform/
+infrastructure/terraform/**/.terraform.lock.hcl
+infrastructure/terraform/**/terraform.tfstate
+infrastructure/terraform/**/terraform.tfstate.*
+infrastructure/terraform/**/crash.log
+infrastructure/terraform/**/override.tf
+infrastructure/terraform/**/override.tf.json
+
+# Ansible
+infrastructure/ansible/**/retry
+infrastructure/ansible/**/.*.swp
+infrastructure/ansible/**/*.retry
+
+# Docker
+docker/docker-compose.override.yml
+
+# Grav CMS
+web/grav/cache/
+web/grav/logs/
+web/grav/tmp/
+web/grav/images/
+web/grav/user/accounts/
+web/grav/user/config/site.yaml.local
+
+# Node modules (if any)
+node_modules/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Backups
+backups/
+*.backup
+*.bak
+
+# Secrets
+*.key
+*.pem
+*.crt
+secrets/