feat: add scriptable CLI interface for CI/CD and scripting

[robertjbass]

Summary

• Add non-interactive CLI commands using commander.js for CI/CD testing and scripting
• Add CI test workflow that runs on PRs to verify CLI functionality
• Bump version to 0.5.0

New CLI Commands

lpgp generate --name "Name" --email "email@example.com" --passphrase "secret"
lpgp generate --name "Name" --email "email@example.com" --no-passphrase
lpgp export-public [--fingerprint <fp>] [--json]
lpgp list-keys [--json]
lpgp encrypt "message" --to <fingerprint|email> [--file <path>] [--output <path>]
lpgp decrypt "message" [--passphrase <pass>] [--file <path>]
lpgp --help
lpgp --version
lpgp              # No args = interactive mode (existing behavior)

Features

• Multiple --to recipients for encryption
• Stdin support for piping messages
• File input/output via --file and --output
• JSON output option for list-keys and export-public
• Passphrase from --passphrase, LPGP_PASSPHRASE env var, or system keychain
• Proper exit codes (0=success, 1=error, 2=decrypt failed, 3=key not found)

Test plan

• CI workflow runs and passes all tests
• Interactive mode still works when running without arguments
• All CLI commands work as expected

[vercel]

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Project	Deployment	Review	Updated (UTC)
pgp	Error		Jan 25, 2026 10:39pm