Add a .distignore for all of the files we want to ignore

.distignore

@@ -0,0 +1,41 @@
+# A set of files you probably don't want in your WordPress.org distribution
+.babelrc
+.deployignore
+.distignore
+.editorconfig
+.eslintignore
+.eslintrc
+.git
+.gitignore
+.gitlab-ci.yml
+.travis.yml
+.DS_Store
+Thumbs.db
+behat.yml
+bitbucket-pipelines.yml
+bin
+.circleci/config.yml
+composer.json
+composer.lock
+dependencies.yml
+Gruntfile.js
+package.json
+package-lock.json
+phpunit.xml
+phpunit.xml.dist
+multisite.xml
+multisite.xml.dist
+.phpcs.xml
+phpcs.xml
+.phpcs.xml.dist
+phpcs.xml.dist
+README.md
+webpack.config.js
+wp-cli.local.yml
+yarn.lock
+tests
+vendor
+node_modules
+*.sql
+*.tar.gz
+*.zip