add Dracula theme (codesandbox#1798)

![Screenshot 2019-04-22 at 08 51 58](https://user-images.githubusercontent.com/1051509/56487646-294cea00-64dc-11e9-80e4-914bc5a129cc.png)


cc @MarcelCutts 




closes codesandbox#966

Author: SaraVieira

standalone-packages/vscode-extensions/out/extensions/dracula-theme.theme-dracula-2.17.0/.gitignore

@@ -0,0 +1,4 @@
+node_modules
+theme
+src/tests
+bin

standalone-packages/vscode-extensions/out/extensions/dracula-theme.theme-dracula-2.17.0/.prettierrc.toml

@@ -0,0 +1,9 @@
+printWidth = 80
+singleQuote = true
+tabWidth = 4
+trailingComma = 'all'
+
+[[overrides]]
+  files = '*.js'
+  [overrides.options]
+    trailingComma = 'es5'

standalone-packages/vscode-extensions/out/extensions/dracula-theme.theme-dracula-2.17.0/.vsixmanifest

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
+  <Metadata>
+    <Identity Language="en-US" Id="theme-dracula" Version="2.17.0" Publisher="dracula-theme"/>
+    <DisplayName>Dracula Official</DisplayName>
+    <Description xml:space="preserve">Official Dracula Theme. A dark theme for many editors, shells, and more.</Description>
+    <Tags>dracula,dark,theme,color-theme</Tags>
+    <Categories>Themes</Categories>
+    <GalleryFlags>Public</GalleryFlags>
+    <Badges></Badges>
+    <Properties>
+      <Property Id="Microsoft.VisualStudio.Code.Engine" Value="^1.13.0" />
+      <Property Id="Microsoft.VisualStudio.Code.ExtensionDependencies" Value="" />
+      <Property Id="Microsoft.VisualStudio.Code.ExtensionPack" Value="" />
+      <Property Id="Microsoft.VisualStudio.Code.LocalizedLanguages" Value="" />
+      
+        <Property Id="Microsoft.VisualStudio.Services.Links.Source" Value="https://github.com/dracula/visual-studio-code.git" />
+        <Property Id="Microsoft.VisualStudio.Services.Links.Getstarted" Value="https://github.com/dracula/visual-studio-code.git" />
+        
+          <Property Id="Microsoft.VisualStudio.Services.Links.GitHub" Value="https://github.com/dracula/visual-studio-code.git" />
+        
+      
+      <Property Id="Microsoft.VisualStudio.Services.Links.Support" Value="https://github.com/dracula/visual-studio-code/issues" />
+      <Property Id="Microsoft.VisualStudio.Services.Links.Learn" Value="https://draculatheme.com/" />
+      <Property Id="Microsoft.VisualStudio.Services.Branding.Color" Value="#3c4557" />
+      <Property Id="Microsoft.VisualStudio.Services.Branding.Theme" Value="dark" />
+      <Property Id="Microsoft.VisualStudio.Services.GitHubFlavoredMarkdown" Value="true" />
+      
+      
+    </Properties>
+    <License>extension/LICENSE.txt</License>
+    <Icon>extension/icon.png</Icon>
+  </Metadata>
+  <Installation>
+    <InstallationTarget Id="Microsoft.VisualStudio.Code"/>
+  </Installation>
+  <Dependencies/>
+  <Assets>
+    <Asset Type="Microsoft.VisualStudio.Code.Manifest" Path="extension/package.json" Addressable="true" />
+    <Asset Type="Microsoft.VisualStudio.Services.Content.Details" Path="extension/README.md" Addressable="true" /><Asset Type="Microsoft.VisualStudio.Services.Content.Changelog" Path="extension/CHANGELOG.md" Addressable="true" /><Asset Type="Microsoft.VisualStudio.Services.Content.License" Path="extension/LICENSE.txt" Addressable="true" /><Asset Type="Microsoft.VisualStudio.Services.Icons.Default" Path="extension/icon.png" Addressable="true" />
+  </Assets>
+</PackageManifest>