v0.1.0

• Add the initial read-only Gmail MCP and CLI for preparing local research datasets.
• Search Gmail with the gmail.readonly OAuth scope and store deterministic local Markdown and JSON output.
• Deduplicate search results by stable Gmail threadId values before fetching complete threads.
• Add local OAuth setup, .env configuration, MCP server integration, and development verification docs.
• Add reusable GitHub workflows for CHANGELOG enforcement, version tags, and GitHub Releases.