feat: add nova_kura project template

[Taure]

Summary

• New template: rebar3 new nova_kura my_app scaffolds a Nova project with Kura ORM
• Repo module with DATABASE_URL parsing via uri_string for cloud deploys (Fly.io, GCP, etc.)
• Dev sys.config with local postgres defaults, prod with JSON logging + graceful shutdown
• Creates src/migrations/ and src/schemas/ directories
• Reuses shared template files (router, health controller, Dockerfile, fly.toml)

Depends on: #55

Usage

rebar3 new nova_kura my_app
cd my_app
# Create postgres database
createdb my_app_dev
# Start dev server
rebar3 shell

Template contents

File	Purpose
src/{name}_repo.erl	Kura repo with DATABASE_URL support
src/{name}_app.erl	App startup with kura:start/1
config/dev_sys.config.src	Local postgres config
config/prod_sys.config.src	Prod config (uses DATABASE_URL)
src/migrations/	Migration directory
src/schemas/	Schema directory

Test plan

• rebar3 new nova_kura test_app generates all expected files
• Repo module compiles and implements kura_repo behaviour
• DATABASE_URL parsing handles standard postgres:// URLs
• Dev config connects to local postgres
• Template reuses shared nova files correctly

🤖 Generated with Claude Code

[burbas]

You are mixing two PR here. Both for k8s and also templates for kura. Remove the k8s and it's approved :)

[Taure]

Superseded by #61 (rebar3 nova new myapp --kura)