Minor reorganization of theme assets (#4149)

Author: bobbrow

Themes/.vscodeignore

@@ -0,0 +1,5 @@
+# ignore vscode settings for extension development
+.vscode/**
+
+# ignore package lock
+package-lock.json

Themes/README.md

@@ -1,18 +1,18 @@
 # C/C++ Extension UI Themes
 
-[Semantic colorization was added to the C/C++ Extension 0.24.0]( https://devblogs.microsoft.com/cppblog/visual-studio-code-c-c-extension-july-2019-update/).  By default, colorization in VS Code is syntactic/lexical and leverages TextMate grammar to associate named 'scopes' with syntactic elements.  Themes and settings can be used to apply the colors associated with those scopes.  Our implementation of semantic colorization leverages the same system of associating colors with named scopes.  But, some tokens that can be colored by semantic colorization in C/C++ do not have existing analogs in VS Code's TextMate grammar.  So, new named scopes are required.  Information about these new scopes can be found [here](https://code.visualstudio.com/docs/cpp/colorization-cpp).  Because these scopes are new, existing themes do not include colors for them either.
+[Semantic colorization was added to the C/C++ Extension in version 0.24.0](https://devblogs.microsoft.com/cppblog/visual-studio-code-c-c-extension-july-2019-update/).  By default, colorization in VS Code is syntactic/lexical and leverages TextMate grammar to associate named 'scopes' with syntactic elements.  Themes and settings can be used to apply the colors associated with those scopes.  Our implementation of semantic colorization leverages the same system of associating colors with named scopes.  But, some tokens that can be colored by semantic colorization in C/C++ do not have existing analogs in VS Code's TextMate grammar.  So, new named scopes are required.  Information about these new scopes can be found [here](https://code.visualstudio.com/docs/cpp/colorization-cpp).  Because these scopes are new, existing themes do not include colors for them either.
 
 We created C/C++ Extension UI Themes to closely match Visual Studio themes, and include colors for many of the new scopes.
 
 ## Example
 
 Light Theme
 
-![Light Theme example](light.png)
+![Light Theme example](Themes/assets/light.png)
 
 Dark Theme
 
-![Dark Theme example](dark.png)
+![Dark Theme example](Themes/assets/dark.png)
 
 ## Contributing
 

Themes/LanguageCCPP_color_128x.png renamed to Themes/assets/LanguageCCPP_color_128x.png

@@ -5,7 +5,7 @@
   "version": "1.0.0",
   "publisher": "ms-vscode",
   "preview": false,
-  "icon": "LanguageCCPP_color_128x.png",
+  "icon": "assets/LanguageCCPP_color_128x.png",
   "readme": "README.md",
   "author": {
     "name": "Microsoft Corporation"
@@ -40,13 +40,13 @@
         "id": "Visual Studio Dark - C++",
         "label": "Dark (Visual Studio - C/C++)",
         "uiTheme": "vs-dark",
-        "path": "./cpptools_dark_vs.json"
+        "path": "./themes/cpptools_dark_vs.json"
       },
       {
         "id": "Visual Studio Light - C++",
         "label": "Light (Visual Studio - C/C++)",
         "uiTheme": "vs",
-        "path": "./cpptools_light_vs.json"
+        "path": "./themes/cpptools_light_vs.json"
       }
     ]
   }