Add new instructions API

[rambo]

The flow:

sequenceDiagram
    actor User
    participant ui
    participant rmapi as RASSE
    participant iapi as Product Integration API
    actor apidev as Integration API dev
    
    apidev->>apidev: Create content as RUNE YAML
    apidev->>apidev: Compile RUNE to JSON
    apidev->>iapi: JSON to API code
    apidev->>iapi: Make JSON dynamic
    User->>ui: Open page with products
    ui->>rmapi: Ask for product list
    rmapi->>rmapi: Check manifest for products
    loop For every product
    rmapi->>iapi: Query metadata
    iapi->>rmapi: Return metadata
    end
    rmapi->>ui: Return all products' metadata
    ui->>User: Render list
    User->>ui: Select product
    ui->>rmapi: Query produt instructions
    rmapi->>iapi: Ask for user specific instructions
    iapi->>iapi: Construct JSON for this user
    iapi->>rmapi: Return personalized JSON
    rmapi->>ui: Return personalized JSON
    ui->>User: Render

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