Ignore the vendored third-party binaries

install.sh fetches codeburn and the Stripe CLI into $HOME_DIR/vendor, and
$HOME_DIR is whichever checkout owns the installed links. For a
contributor that is this repository, so a 37MB stripe binary was landing
in the working tree as untracked and showing up in every git status.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: ralyodio

.gitignore

@@ -16,3 +16,8 @@ credentials.json
 !.env.example
 *.pem
 *.key
+
+# Third-party binaries the installer fetches (codeburn, the Stripe CLI). They
+# land in the checkout that owns the links, which for a contributor is this
+# repo, so without this a 37MB stripe binary shows up as untracked.
+vendor/