Refactor: Extract Memory Core to @neomjs/ai-memory-server

[tobiu]

Refactor: Extract Memory Core to @neomjs/ai-memory-server

Context

To enable broader adoption (Epic #7919), we need to extract the Memory Core from the monorepo into a standalone package.

Requirements

1. Separation: Move ai/mcp/server/memory-core code to a structure that can be published independently.
2. Dependencies: Ensure it depends on @neomjs/ai-core (if created) or bundles its dependencies.
3. CLI: Ensure the runner.mjs can be invoked via npx.
4. Publishing: Setup package.json for npm publication.

Output

• A published npm package @neomjs/ai-memory-server.