Support for custom CLI parameters

Is your feature request related to a problem? Please describe.

When I need to run e.g. ui5 serve with different configurations, I am currently forced to create multiple ui5*.yaml files. In some cases, I need exactly the same configuration except one value is different. The overhead of maintaining multiple files for that is increasing the costs of maintaining a UI5 project.

Describe the solution you'd like

Allow the usage of custom CLI parameters that are accessible in my middleware/task e.g. I would like to call ui5 serve --debug --magic 42 and in my middleware I have access to e.g. this global configuration as e.g. object

{
  debug: true
  magic: '42'
}

Describe alternatives you've considered

I could also solve the same problem, if it would also be possible to provide the configuration not as yaml but as js file. Then, I have all the flexibility needed to create inheritance between configs or custom creation of the config based on other parameters.

Additional context

No

Start with the ui5 serve command and trace how middleware and tasks receive configuration. Define how custom parameters such as --debug and --magic 42 should be exposed, then verify that the same configuration can be consumed without maintaining multiple ui5 YAML files.