MemoStem integrations v0.4.0

MemoStem is now easier to discover and connect from ChatGPT, Claude, Codex, and other remote MCP clients.

Highlights:

• consumer-focused public repository and install guides
• clear explicit-selection, private-pending, human-review privacy boundary
• ChatGPT, Claude, and Codex listing metadata
• official remote MCP Registry metadata under io.github.girapphe/memostem
• GitHub OIDC publication workflow with a pinned publisher checksum
• paste-ready OpenAI and Anthropic review cases and submission fields

The application and MCP implementation remain private. OpenAI and Anthropic directory approval are separate provider review states.