feat: add skeptical-updater 0.0.1 placeholder (packaging only, bumped by CI to the first upstream tag)

.gitignore

@@ -0,0 +1,15 @@
+# downloaded and generated tarballs
+*.tar.gz
+*.tar.xz
+# built packages and build metadata
+*.deb
+*.dsc
+*.changes
+*.buildinfo
+*.build
+# debhelper build tree
+debian/skeptical-updater/
+debian/.debhelper/
+debian/files
+debian/*.substvars
+debian/debhelper-build-stamp