jsonschema doesnt support named windows or panes

Is your feature request related to a problem? Please describe. configuration example in READNE.md does not conform with the schema https://json.schemastore.org/tmuxinator.json

windows and panes can be specified as

• [supported] a command
• [supported] a set of attributes
• [unsupported] map where the key is the values store the attributes.

Describe the solution you'd like it is possible in jsonschema to this variation using an object with additionalProperties, This is something the current schema does not use at all.

Describe alternatives you've considered

• storing a modified schema locally?
• adding an actual 'name/window_name/pane_name' attribute to the windows and panes ? would make the config more explicit and easier to read

Additional context attaching a schema ive edited manually (just written it, unsafe / untested / but seems to work with yaml-language-server) tmuxinator.json