feat(command-not-found): add alpine support (#13864)

plugins/command-not-found/README.md

@@ -32,5 +32,6 @@ It works out of the box with the command-not-found packages for:
 - [SUSE](https://www.unix.com/man-page/suse/1/command-not-found/)
 - [Gentoo](https://github.com/AndrewAmmerlaan/command-not-found-gentoo/tree/main)
 - [Void Linux](https://codeberg.org/classabbyamp/xbps-command-not-found)
+- [Alpine Linux](https://pkgs.alpinelinux.org/package/edge/main/x86_64/command-not-found)
 
 You can add support for other platforms by submitting a Pull Request.

plugins/command-not-found/command-not-found.plugin.zsh

@@ -74,3 +74,10 @@ if [[ -x /usr/bin/command-not-found ]]; then
     /usr/bin/command-not-found "$1"
   }
 fi
+
+# Alpine: https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/command-not-found/APKBUILD
+if [[ -x /usr/libexec/command-not-found ]]; then
+  command_not_found_handler() {
+    /usr/libexec/command-not-found "$1"
+  }
+fi