Scaffold applications from reusable provider templates #130

Description

Bootstrap projects from reusable templates with provider-specific runtime and CLI wiring already generated.

edgezero new is implemented by the template-driven generator. Embedded common and per-adapter templates produce a multi-crate application workspace, and an existing generated-project integration test builds generated output.

Steps to reproduce

1. Inspect Command::New, generate_new and embedded template registration.
2. Inspect the generated-project build integration test.

Expected behavior

Users can create a provider-wired application skeleton through the CLI.

Impact

The original project-bootstrapping capability is delivered; future template catalog/customization requests can be scoped separately.

Proposed fix

Close as completed. Retain workflow/container template improvements in their specific follow-ups.

Done when

• A new-project CLI command invokes reusable templates.
• Generated projects include common application/CLI crates and selected adapter wiring.
• Generated-project build coverage exists.

Related

• Parent: Complete CLI and local developer workflows #124.
• Generated GitHub workflows: Provide default GitHub workflows for format, test, Dependabot, CodeQL and Docker #161.
• Docker scaffolding: Axum: scaffold hardened production application Dockerfiles #398.
• CLI command surface
• Template-driven project generation
• Adapter template registration
• Generated-project build integration

The requested implementation is present on the audited main revision. This audit inspected source and existing coverage; it did not rerun the tests.