docs(themes): add theme builder readme

packages/core/scripts/theme-builder/readme.md

@@ -1,3 +1,25 @@
 # Theme Builder
 
+CD to core package:
+
+    cd packages/core
+
+
+Let latest:
+
+    git pull --rebase
+
+
+NPM Install
+
+    npm install
+
+
+Open Theme Builder App
+
     npm run theme-builder
+
+
+Commit CSS Changes
+
+    style(theme): update oceanic theme