Feature proposal: Creating multiple template parameters from a dict

[eseiver]

Currently, when creating a Template object with multiple parameters, users need to call template.add() separately for each name-value pair.

    param_dict = {
        'foo': 'bar',
        'eggs': 'spam',
    }
    template = mwparserfromhell.nodes.template.Template('name')
    for k, v in param_dict.items():
        template.add(k, v)

This process can be tedious and less efficient, especially when dealing with a large number of parameters.

Proposed solutions:

1. Direct dictionary passing
   Allow users to pass the parameters as a dict directly when creating a Template object.

    param_dict = {
        'foo': 'bar',
        'eggs': 'spam',
    }
    template = mwparserfromhell.nodes.template.Template('name', params=param_dict)

2. Bulk addition method
   Introduce a new method in Template, such as add_all(), to allow adding multiple parameters at once using **kwargs.

    param_dict = {
        'foo': 'bar',
        'eggs': 'spam',
    }
    template = mwparserfromhell.nodes.template.Template('name')
    template.add_all(**param_dict)

Benefits:

• Simplified handling of template parameters
• More flexibility and convenience in working with Template objects

I'd be happy to start working on a PR for this, but wanted to get feedback from the community first before proceeding to implementation.