Plugin and Marketplace Controls Settings

Managed Settings only for all of the below.

{
  "strictKnownMarketplaces": [
    { "source": "github", "repo": "acme-corp/plugins" }
  ],
  "blockedMarketplaces": [
    { "source": "github", "repo": "untrusted/plugins" }
  ],
  "pluginTrustMessage": "All plugins from our marketplace are vetted by the IT security team."
}

strictKnownMarketplaces — allowlist of plugin marketplaces users can add from. Undefined = no restrictions. Empty array = block all marketplace additions.
blockedMarketplaces — block these marketplace sources before download.
pluginTrustMessage — appended to the plugin trust warning shown at install time.