RDoc-3808 Enable reo.dev

[poissoncorp]

Issue link

https://issues.hibernatingrhinos.com/issue/RDoc-3808/Enable-reo.dev-for-the-new-documentation

Additional description

Installs the reo.dev tracking snippet on the docs site.
The snippet is added directly to docusaurus.config.ts headTags (rather than going through GTM) so it loads in before page hydration. The snippet is wrapped in if (location.hostname !== "docs.ravendb.net") return;. The Docusaurus url is hardcoded to https://docs.ravendb.net/ and the staging deploy uses the same build artifact, so without a runtime gate, internal browsing of staging would pollute the reo dashboard. The guard ensures static.reo.dev/<id>/reo.js is only ever requested on production.

Once merged, needs CSP bump

Type of change

• Content - docs
• Content - cloud
• Content - guides
• Content - start pages/other
• New docs feature (consider updating /templates or readme)
• Bug fix
• Optimization
• Other

Changes in docs URLs

• No changes in docs URLs
• Articles are restructured, URLs will change, mapping is required (update /scripts/redirects.json file, set Documents Moved PR label)

Changes in UX/UI

• No changes in UX/UI
• Changes in UX/UI (include screenshots and description)