fix(performance): Explicitly include items in the vsix #2669

closes #1899

Author: jpinkney-aws

.vscodeignore

@@ -1,28 +1,22 @@
-.github/**
-.vscode/**
-.vscode-test/**
-.changes/**
-scripts/**
-buildspec/**
-dist/src/test/**
-dist/src/integrationTest/**
-dist/src/testFixtures/**
-dist/test/**
-dist/integrationTest/**
-dist/third-party/test/**
-dist/**/*.map
-src/**
-out/**
-third-party/test/**
-webpack.config.js
-.gitignore
-.nycrc.json
-Dockerfile
-tsconfig.json
-tslint.json
-codebuild-image-buildspec.yml
-node_modules
-docs/**
-designs/**
-coverage/**
-package.json.bk
+# Ignore everything by default. #1899
+*
+*/**
+
+# Allowlist
+!dist/*
+!dist/libs
+!dist/*/!(testFixtures|test)/**/!(*.*.map)
+!dist/*/!(*.*.map)
+!media/**
+!resources/**
+!syntaxes/**
+!templates/**
+!third-party/**
+!types/**
+!LICENSE
+!NOTICE
+!package.json
+!package.nls.json
+!quickStart**
+!README.**
+!CHANGELOG.md