feat: Create backups of configuration when the force option is not used.

justfile

@@ -1,4 +1,6 @@
 docker_image_name := "swift-hpa"
+install_path := "~/.local/share/bin/hpa"
+completion_path := "~/.local/share/zsh/completions/_hpa"
 
 build mode="debug":
   swift build -c {{mode}}
@@ -37,3 +39,7 @@ update-version:
     --allow-writing-to-package-directory \
     update-version \
     hpa
+
+install: (build "release")
+  @cp .build/release/hpa {{install_path}}
+  @{{install_path}} --generate-completion-script zsh > {{completion_path}}