Add completion for restic

src/_restic

@@ -0,0 +1,31 @@
+#compdef restic
+# ------------------------------------------------------------------------------
+# Description
+# -----------
+#
+#  Completion script for restic (https://restic.net).
+#
+#  This file was generated by restic
+#
+#  restic generate --zsh-completion _restic
+#
+# ------------------------------------------------------------------------------
+
+_arguments \
+  '1: :->level1' \
+  '2: :_files'
+case $state in
+  level1)
+    case $words[1] in
+      restic)
+        _arguments '1: :(backup cache cat check diff dump find forget generate help init key list ls migrate mount options prune rebuild-index recover restore self-update snapshots stats tag unlock version)'
+      ;;
+      *)
+        _arguments '*: :_files'
+      ;;
+    esac
+  ;;
+  *)
+    _arguments '*: :_files'
+  ;;
+esac