Feature request 113

[brentlblair]

Implements #113

Allow the user to specify a file path in the extension settings Added MVBasic.customFunctionPath that will point to a file of custom user functions. This is a sample of the json file.

{
   "Language": {
      "Type": "customFunctions",
      "functions": [
         {
            "key": "FunctionName",
            "insertText":"FunctionName('var1')",
            "icon": 2,
            "index": 1,
            "detail": "function description that will display in the hover",
            "documentation": "function documentaion that will display in the hover\r\nThis is line 2"
         }
      ]
   }
}

It might be better to not use a file path, and just point to a roaming file like snippets does:
C:\Users\user\AppData\Roaming\Code\User\snippets\customFunctions.json

[itsxallwater]

After talking with Brent we're checking with Microsoft on one thing re: CompletionItems. microsoft/vscode-extension-samples#338

[itsxallwater]

@brentlblair I know we were chatting on conflict due to collision of data but what about collision at key? It might be interesting if a custom specified key took precedence--it'd give users an opportunity to provide their own custom definition to overload the language type provided version.