refactor: remove deprecated YAML template files

- Deleted all 'template.yml' files from various blueprints as part of the transition to TOML format.
- Updated the script to delete the 'template.yml' files instead of converting them to 'template.toml'.

blueprints/peppermint/template.yml

@@ -1,22 +0,0 @@
-variables:
-  main_domain: ${domain}
-  api_domain: ${domain}
-  postgres_password: ${password}
-  secret: ${base64:32}
-
-config:
-  domains:
-    - serviceName: peppermint-app
-      port: 3000
-      host: ${main_domain}
-    - serviceName: peppermint-app
-      port: 5003
-      host: ${api_domain}
-
-  env:
-    MAIN_DOMAIN: ${main_domain}
-    API_DOMAIN: ${api_domain}
-    POSTGRES_PASSWORD: ${postgres_password}
-    SECRET: ${secret}
-
-  mounts: []