genkit npm install should install @genkit-ai/dev-local-vectorstore as well, or docs should change

[Yorkemartin]

Is your feature request related to a problem? Please describe.

The RAG flow docs offer install instructions, but do not mention that you need to install @genkit-ai/dev-local-vectorstore independently.

Describe the solution you'd like

Change docs or include @genkit-ai/dev-local-vectorstore within the general genkit install

[chrisraygill]

@pavelgj @genkit-ai/dev-local-vectorstore be included in the new genkit metapackage?