Update '.vscode/settings.json' to identify snippet files as 'JSON with Comments' (#2065)

This change is motivated by the need for better source documentation (e.g. which snippet prefixes are for ISE compatibility), and is justified by the fact that VS Code itself identifies snippet files as 'JSON with Comments'.

Author: travisclagrone

.vscode/settings.json

@@ -6,6 +6,11 @@
     // Add a visual ruler for the typescript linting line length
     "editor.rulers": [120],
 
+    "files.associations": {
+        // Use JSONC instead of JSON because (1) that's how VS Code interprets snippet files, and (2) it enables better source documentation.
+        "**/snippets/*.json": "jsonc"
+    },
+
     "search.exclude": {
         "**/node_modules": true,
         "**/bower_components": true,