Rename the eslint-plugin-shopify package to @shopify/eslint-plugin

Author: alexandcote

.eslintignore

@@ -1,7 +1,8 @@
 node_modules
 /coverage
 
+
 # The eslint plugin test fixtures contain files that deliberatly fail linting
 # in order to test that the plugin reports those errors. We don't want the
 # normal eslint run to complain about those files though so ignore them here.
-packages/eslint-plugin-shopify/tests/fixtures
+packages/eslint-plugin/tests/fixtures

.eslintrc.js

@@ -1,9 +1,9 @@
 module.exports = {
   extends: [
-    'plugin:shopify/typescript',
-    'plugin:shopify/react',
-    'plugin:shopify/prettier',
-    'plugin:shopify/node',
-    'plugin:shopify/jest',
+    'plugin:@shopify/typescript',
+    'plugin:@shopify/react',
+    'plugin:@shopify/prettier',
+    'plugin:@shopify/node',
+    'plugin:@shopify/jest',
   ],
 };