New App: LukeLauncher

LukeLauncher (https://lukelauncher.de/) is a minimal, fast - categorie based homescreen replacement.

- [x] The app complies with the inclusion criteria
- [x] (me) The original app author has been notified (and supports the inclusion)
- [x] All related fdroiddata and RFP issues have been referenced in this merge request
- [x] The upstream app source code repo contains the app metadata (summary/description/images/changelog/etc) in a Fastlane or Triple-T folder structure
- [x] Builds with fdroid build
- [x] Releases are tagged

metadata/luke.launcher.yml

@@ -0,0 +1,27 @@
+Categories:
+  - System
+  - Theming
+License: GPL-3.0-only
+WebSite: https://lukelauncher.de
+SourceCode: https://gitlab.com/LukeSoftware/lukelauncher
+IssueTracker: https://gitlab.com/LukeSoftware/lukelauncher/issues
+
+AutoName: LukeLauncher
+
+RepoType: git
+Repo: https://gitlab.com/LukeSoftware/lukelauncher
+
+Builds:
+  - versionName: 1.0.18
+    versionCode: 10018
+    commit: v1.0.18
+    subdir: platforms/android/app
+    gradle:
+      - yes
+
+MaintainerNotes: This is a Cordova app, built from source.
+
+AutoUpdateMode: Version v%v
+UpdateCheckMode: Tags v.*[0-9]$
+CurrentVersion: 1.0.18
+CurrentVersionCode: 10018