Make emmet.syntaxProfiles configuration item to support custom language Id

[Tenormis]

Make emmet.syntaxProfiles configuration item to support custom language Id. For example:

Previously, if you wanted to modify the final output of Markdown Emmet, you had to configure it like this:

  "emmet.includeLanguages": { "markdown": "html" },
  "emmet.syntaxProfiles": {
    "html": { // modified the html configuration
      "tag_nl": false,
      "tag_nl_leaf": false
    }
  },

Since it modifies the html configuration, the output for the HTML language will also be affected. With this commit, it is now supported:

  "emmet.includeLanguages": { "markdown": "html" },
  "emmet.syntaxProfiles": {
    "markdown": { // only modified the markdown configuration
      "tag_nl": false,
      "tag_nl_leaf": false
    }
  },

This way, only the markdown configuration is modified, and the HTML language configuration will not be affected.

[Tenormis]

@rzhao271 Looking forward to your approval 😀

[Tenormis]

Can anyone help approve it 😭

[rzhao271]

Hi, thanks for the bump!

[rzhao271]

Wouldn't this section only run right when the package is loaded?
To override the use of profilesConfig[syntax], you might have to change the getProfile API or provide a new one.