Ship supported Amber V2 beta web template

[crimson-knight]

Summary

• release Amber CLI 2.0.2 for Amber 2.0.0-beta.1
• replace the web scaffold with an official, core-only, ECR template using typed configuration and static routes
• correct absolute paths, dependency installation, generated specs, and core generator output
• add platform release smoke tests and reject macOS OpenSSL 1.1 linkage
• publish install, web-app, generator-support, and release guides

Support boundary

Web application generation and core controller/schema/job/mailer/channel/migration output are release-gated. Persistence-backed model/scaffold/API/auth and native output are labeled preview.

Validation

• 406 CLI/LSP specs pass
• generated source formatting passes
• fresh web app installs, tests, builds, starts, and serves the homepage and CSS
• all six supported core generator paths compile and pass together
• locally built macOS CLI links to OpenSSL 3, not OpenSSL 1.1