Prevent glob from building .md files in the _markbind folder

[jamos-tay]

Using general glob patterns like **/*.md can cause .md files in the _markbind folder such as footer.md, head.md to be selected as pages for building.

  "pages": [
    {
      "glob": "**/*.md"
    },
  ]

Should we add an exclusion for the _markbind folder?

[damithc]

On a related note, I was hoping we can use the include feature for files within _markbind folder as it can help reduce duplication among system files.

[Xenonym]

@jamos-tay this issue was alluded to in #525 and will probably be fixed when that PR is complete?

FYI: @amad-person

[jamos-tay]

@Xenonym Sure, looks good

I'll close this issue after the merge then