docs: Include cat in custom pagers examples

[NathanielRN]

cat is the default git pager, and although not as sophisticated, it redraws faster than other pagers who suffer from the bug in #5327. Adding it to the docs will help new devs know that this is an option.

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[stefanhaller]

It doesn't make much sense to use cat as a pager; better to use no pager at all, that's more efficient. Use - pager: "" for that.

I don't really think we need to document this though.

[NathanielRN]

Thanks, I didn’t know “nothing” was an option. I thought using cat was helpful because it doesn’t have the render issues of #5327. I’ll close this then and if others feel the same later feel free to mention that empty strong option.

[fpuga]

I search the issues looking exactly for how to configure the default pager as an option: - pager: ""

I think it will be a great addition to the docs. I can provide a PR if you are interested.

Adding here a single line will be fine for me.

git:
  pagers:
    - pager: "" # default no pager
    - pager: delta --dark --paging=never
    - pager: ydiff -p cat -s --wrap --width={{columnWidth}}
      colorArg: never
    - externalDiffCommand: difft --color=always

[stefanhaller]

It's maybe even cleaner to add the default diff by adding an empty object to the list (i.e. {}, don't set any properties), since the default value for the pager property is the empty string.

I added this to the docs in #5656.