Build Awesome v4.0.0-alpha.8

# To install, choose one of these:
npm install @11ty/eleventy@canary --save-exact
npm install @awesome.me/buildawesome@alpha --save-exact

Full v4 Milestone: https://github.com/11ty/buildawesome/milestone/46?closed=1
Full Changelog: v4.0.0-alpha.7...v4.0.0-alpha.8

---

• Breaking: bump Node minimum to 22.15+ (previously 20.19+) #4271
• Batched Incremental: Fixes #4274 Adds support for multiple eligible incremental files in a single build #4275
• Using npm stage publish for extra release security hardening.
• Removes Promise.withResolvers polyfill (no longer necessary) #4289
• Fix preprocessor callbacks run twice when using --incremental #4292
• Upstream repo moved from https://github.com/11ty/eleventy to https://github.com/11ty/buildawesome
• Adds @awesome.me/buildawesome publish and the Build Awesome rename stuff (no breaking changes), more at #4294
• Fix TypeScript data files not being processed by @cypressSap #4247
• Breaking (canary): removes page.inputPathDir and page.dir (introduced in v4.0.0-alpha.5) follow along at #3794
• Adds TypeScript types d.ts file for Configuration API (documentation pending, see @11ty/eleventy/UserConfig or @awesome.me/buildawesome/UserConfig export)
• Adds Node 26 to CI
• Fix module.register() deprecation message #4283

Dependencies

• Internals: moves from debug to obug (~26KB savings, no external changes) #4291
• Bump @11ty/eleventy-dev-server from 3.0.0-alpha.6 to 3.0.0-alpha.10 #4260
  • https://github.com/11ty/dev-server/releases/tag/v3.0.0-alpha.10
  • https://github.com/11ty/dev-server/releases/tag/v3.0.0-alpha.8
• Bump @11ty/posthtml-urls from 1.0.2 to 1.0.3 #4254
• Bump liquidjs from 10.25.0 to 10.25.5 #4261
• Bump @11ty/gray-matter from 2.0.1 to 2.1.0 (dependency upgrades)
• Upgrades ava test runner (devDep) from v6 to v8

Thank you for PR review help from @Ryuno-Ki!
Thank you for @cristovaov for joining the Eleventy Discord moderator team!