Add package and symlink opt

opt/autoload

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+../autoload

opt/colors

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+../colors

package.json

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+{
+  "name": "gruvbox",
+  "version": "2.0.0",
+  "repository": "git@github.com:morhetz/gruvbox.git",
+  "author": "Pavel Pertsev <morhetz@gmail.com>",
+  "license": "MIT",
+  "files": [
+    "opt"
+  ]
+}