adding lilbft submodule

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libft"]
+	path = libft
+	url = gitea@gitea.hugulumu.com:42/42_INT_01_libft.git

README.md

@@ -1,4 +1,14 @@
 # 42_EXT_05_computorv1
 
+
+## ressources
+
 - project intra : https://projects.intra.42.fr/projects/42cursus-computorv1 
 - project luke : https://github.com/LuckyLaszlo/computorv1 
+
+## install
+
+this project uses submodules (maybe recursively), so either : 
+
+- `git clone --recurse-submodules <repo-url>`
+- or, after cloning : `git submodule update --init --recursive`