Adding basic informations in README

README.md

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+# Godot Third Person basic scene
+
+Project to have a basic third person scene for Godot 4 where to move a character on a simple plane. Aim to be used as a test scene to add 3D content. If added in a project, it should be able to be launched without any dependencies with F6
+
+## Godot version used
+
+Use only the official Alpha 1 Godot release : https://downloads.tuxfamily.org/godotengine/4.0/alpha1/
+
+## Best practices
+
+- use only snake case for names