Add configurable API version selection with three methods:
- Config file: api_version: "v1" or "v2" in .edge-connect.yaml
- CLI flag: --api-version v1/v2
- Environment variable: EDGE_CONNECT_API_VERSION=v1/v2
Changes:
- Update root.go to add api_version config and env var support
- Update app.go and instance.go to support both v1 and v2 clients
- Add example config file with api_version documentation
- Default to v2 for backward compatibility
- Apply command always uses v2 (advanced feature)
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Co-Authored-By: Claude <noreply@anthropic.com>
