feat(flight-finder): implement milestone M1 - domain model and skill contract

skills/flight-finder/node_modules/crypto-js/CONTRIBUTING.md

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+# Contribution
+
+# Git Flow 
+
+The crypto-js project uses [git flow](https://github.com/nvie/gitflow) to manage branches. 
+Do your changes on the `develop` or even better on a `feature/*` branch. Don't do any changes on the `master` branch.
+
+# Pull request
+
+Target your pull request on `develop` branch. Other pull request won't be accepted.
+
+# How to build
+
+1. Clone
+
+2. Run
+
+    ```sh
+    npm install
+    ```
+
+3. Run
+
+    ```sh
+    npm run build
+    ```
+    
+4. Check `build` folder