docs: add welcome hello world file

HELLO.md

@@ -1,5 +0,0 @@
-Hello and welcome to the Trips repository!
-
-We are glad you are here. This project uses standard git workflows and follows the conventions already in the codebase.
-
-If you are just getting started, begin by reading the README and browsing the main modules to understand the structure.

HELLOWORLD.md

@@ -0,0 +1,11 @@
+Hello and welcome to the trips project!
+
+We are glad you are here. This repository exists to help you build and
+improve travel experiences, and your contributions make it better for
+everyone.
+
+If you are new, start by reading the README and checking the scripts and
+configuration files to understand how the project is set up. Then pick an
+issue or improvement you are interested in and dive in.
+
+Thanks for being part of the team and happy coding!