overly restrictive install.yml check (template does not use any apis)

[shazron]

See submission #1477 which does not have any apis.

This template can be installed on the command line:
aio app init my-mcp-server --template @adobe/generator-app-remote-mcp-server-generic or aio templates install --no-process-install-config /local-path/generator-app-remote-mcp-server-generic (with may have a non-fatal error regarding the same schema validation) so the restriction may not make sense.

Expected

Able to add a template to the registry with no apis in install.yml

Actual

Cannot add a template to the registry with no apis in install.yml (schema validation error)

Fix

Update the schema, so the apis array can be minItems of zero.
See

aio-template-submission/registry.schema.json

Line 68 in 5052b7a

"minItems": 1,

Workaround

Remove the apis key in install.yml if you don't have APIs.