feat: add skills editor page with ew provider block

[anfibiacreativa]

Summary

• Adds apps/skills.md as the /apps/skills page in da-live
• Uses ew-skills block class so loadBlock resolves via providers.ew to ew-extensions (da-skills)

Why

• The skills editor moved from da-nx to da-skills (ew-extensions)
• da-nx [LOC] Find fragments in sheets #446 added providers.ew routing in loadBlock, but the consumer page needs the ew- prefix for the resolution to work
• The old nx-skills-editor class pointed at a block that no longer exists in da-nx

What Changed

• apps/skills.md (new file) -- page shell with <div class="ew-skills"></div> so loadBlock matches the ew provider and loads blocks/skills/skills.js from ew-extensions

Test Plan

• Start da-live (:3000), da-nx (:6456 on ew-provider-support-v2), da-skills (:3001)
• Navigate to http://localhost:3000/apps/skills?nx=local&nxver=2#/{org}/{site}
• Verify the skills editor loads from :3001/blocks/skills/skills.js
• Also update the content bus page at content.da.live/adobe/da-live/apps/skills to use ew-skills

Risks / Follow-ups

• The content bus at content.da.live still serves the old nx-skills-editor class. Until that authored page is updated, the AEM CLI dev server will serve stale content from the remote mount, not this local file.
• Depends on da-nx #446 for providers.ew support
• Depends on da-skills ew-block-contract branch for blocks/skills/skills.js entry point

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch.
In case there are problems, just click the checkbox below to rerun the respective action.

• Re-sync branch

Commits

• 2555ffe ✅ (latest)
• aca553a ✅

[mhaack]

@anfibiacreativa @hannessolo IHMO this can be closed, not needed any more.