Add Remark config

[MegaApplePi]

part of #3310

After looking at Codacy's patterns page, some options don't even prompt what exactly we want to use (e.g. using ATX headings, not Setext (it might actually be confusing itself with the frontmatter/YAML stuff)). This should also enable the frontmatter plugin which should allow it to check for YAML and ignore it whatever's in it.

Things to do:

• Check if codacy actually uses the YAML plugin
  • it looks like it does
• Make some more adjustments to the config file ... the docs was giving me a headache.

[MegaApplePi]

Some random things I found while looking through:

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emphasis-marker might not work as intended. strong-marker has a similar issue as well.

| [\_WWWWWW_WWWWWW_](https://osu.ppy.sh/users/1981781)   | Portuguese, Spanish, Japanese|

It's warning that this line should be using * for emphasis, maybe all of the underscores need to be escaped?

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list-item-spacing might not be working as intended.

- Item 1
  - Item 2
- Item 3

It is warning that there should be an empty space after item 2.

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no-missing-blank-lines warns if an HTML comment don't have have a blank line in-between itself and something else. Probably not an issue, just pointing it out.

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The NSC has a rule regarding filenames, but it looks like some of them have been ignored. Not sure what to set no-file-name-irregular-characters to or if we should disable it. (setting it to \\.a-zA-Z0-9-_! for now)

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code-block-style might get confused with HTML indenting with 4 spaces.

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some no-blockquote-without-marker warnings may actually be lists/paragraphs missing an empty space before the blockquote (they are not supposed to be part of the blockquote)

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no-literal-urls appears to give false positives. Not exactly sure what causes it, but I think other symbols inside the link syntax causes this or emphasizing.

[peppy]

Thanks for this! Let's merge as-is and see how it adjusts inspections (we can make further changes post-merge).