vscodeignore: update the ignore rules

Update the ignore rules to reduce the package size and remove unnecesary
files.  With the new set of rules the package now contains 3 files:
- out/main.js
- README.md
- package.json

The node_modules are not required for the plugin at runtime as the
minification should consume them and package it into the unified module.
This reduces the extension package from ~321 KiB to ~65 KiB.

Author: compnerd

Editors/vscode/.vscodeignore

@@ -1,9 +1,5 @@
-.vscode/**
-.vscode-test/**
-out/test/**
-out/**/*.map
-src/**
+**/*.ts
+**/tsconfig.json
 .gitignore
-tsconfig.json
-vsc-extension-quickstart.md
-tslint.json
+.vscode/
+node_modules/