Add Adventure Recast

[lucascaleida]

Adds Adventure Recast to the extension store. It brings Adventure Recast modules into Owlbear Rodeo with chapter reading, maps, editable character sheets, tokens, shared audio, and real-time voice and video calls.

Store Markdown: https://raw.githubusercontent.com/lucascaleida/adventure-recast-owlbear/main/store.md
Manifest: https://adventurerecast.com/owlbear/manifest.json

The listing explains that the GM needs an active Adventure Recast private beta account and a module. Players access character sheets using invitation codes supplied by the GM. Real-time calls include a movable, collapsible camera window, microphone mute, optional camera, and individual participant volume controls. The listing also documents AI token credit usage and the connectivity limitations of peer-to-peer calls.

• Public raw GitHub Markdown with the required YAML fields: title, description, author, hero image, icon, supported tags, manifest, and learn-more.
• Changes are on a separate branch with a descriptive commit message.
• One commit targeting main.
• Adventure Recast is the last entry in extensions.json.

Validation: the published Markdown passes the repository's Joi metadata schema; the image, icon, manifest, and website return HTTP 200. The hosted extension entry point and JavaScript assets also return HTTP 200. No verified badge is requested by this submission.

[Several-Record7234]

Validation script and image URLs check out fine. 'Learn-more' link is fine.

Extension functionality and API usage not checked.

(Note: heavy Gen-AI use in the website, and the option to use it within the extension.)