added template for Puppet modules

Co-Authored-By: Mario Finelli <mfinelli@users.noreply.github.com>

community/Puppet.gitignore

+# gitignore template for Puppet modules
+# website: https://forge.puppet.com/
+
+# Built packages
+pkg/*
+
+# Should run on multiple platforms so don't check in
+Gemfile.lock
+
+# Tests
+spec/fixtures/*
+coverage/*
+
+# Third-party
+vendor/*
+.bundle/*