XML Files support with settings

[angelozerr]

Like we have for XML colors support and XML references support, it should be nice to have XML Files support to manage:

• completion for file for attribute / text node
• documentLink for file for attribute / text node
• validation for file for attribute / text node

Given this XML file:

<files>
  <file path="path/to/my/file" />
</files>

It should be nice to support completion, validation, dcoument link for file/@path attribute with this settings:

"xml.files": [
   {
      "pattern": "**/*.xml",
      "expressions": [
         {
            "xpath": "file/@path"
         }
      ]
   }
]

We could add new settings too to

• say that path is a folder (anf not file)
• configure a pattern path to know in which directory file must be search and filter from given file extension (ex : **/*.txt)