Expose the factory 'default', 'by_path' methods, to assist custom strategy

[goulf-3m]

Issues

• I have checked existing issues and there are no existing ones with the same request.

Feature description

There are a few generate-workspace-summary related issues relating to ignoring some specific norg files, unresolved.

The module already provides a flexible stragety option to allow any kinds of generation method.
But, in a 'init.lua' config file, writing lengthy implementation of the strategy is not elegant.

As the 'default' and 'by_path' implementations are already quite good, lacking a little bit customization,
allowing reusing these implementations would be preferable.

For example, those unresolved issues can simply be solved by filtering unwanted norg files before calling the 'default' implementations.

Help

No

Implementation help

No response

[benlubas]

@goulf-3m Please have a look at that PR. Let me know if it's missing anything

[goulf-3m]

@goulf-3m Please have a look at that PR. Let me know if it's missing anything

I see, the 'get_first_heading_title' function is exposed.

But I was expecting the function at

        default = function()
            return function(files, ws_root, heading_level, include_categories)

to be callable from my strategy function.
This default function is a very long function that works almost as I expected, which I want to re-use without re-writing.
I might want to preprocess the arguments passed to it or postprocess the returned object.

I didnot dig into the details, but comparing the function lengths tells me, I still need to write a lot of code to reproduce the default strategy with the exposed functions in this PR.