Feature
* feat(cli): promote organization app commands, and add `legacy` namespace (17) ([`86f951d`](https://github.com/numerous-com/numerous-sdk/commit/86f951d346434b34cce850f42d53922c9fd164a8))
>
> * Promote commands related to organization apps (`deploy`, `delete`, `logs`) to be root commands.
> * Rename &34;app name&34; concept of new app commands to &34;app slug&34; to avoid confusion.
> * Move existing commands for managing apps with `.app_id.txt` to the `legacy` namespace.
> * Add new `numerous init` command that does not register a legacy app in the Numerous server,
> or create `.app_id.txt`. Move existing `init` to the `legacy` namespace.
> * Add helpful messages to direct the user to the correct commands.
> * For `numerous deploy`, `numerous logs`, and `numerous delete` if no app slug is provided
> through CLI arguments, or in the manifest, use a sanitized version of the app display name
> from the manifest