chore: add vendor directory to .gitignore

Ignore vendor directory to prevent vendored dependencies from being
tracked in version control.

Signed-off-by: Diego Ciangottini <diego.ciangottini@pg.infn.it>

Author: dciangot

.gitignore

@@ -1,5 +1,7 @@
 envs.sh
 bin
+vendor/
+
 # Eclipse IDE
 .project
 .settings