Install the vi to vim compatibility package

A number of installed applications like visudo, vipw and vigr need vi to work as expected.
This commit installs the Arch's vi to vim compatibility package so that everything will work as expected after a fresh installation.

Fixes #497

mkosi.conf.d/10-packages-cli.conf

@@ -14,6 +14,7 @@ Packages=alsa-utils # alsamixer and other useful audio debugging tools
          desktop-file-utils # desktop-file-validate and related useful tools
          drm-info # for debugging KWin and other graphics issues
          duf
+         ex-vi-compat
          fastfetch
          fd
          fzf

mkosi.extra/usr/lib/command-not-found-handler.py

@@ -23,8 +23,7 @@ known_alternatives = {
     "nslookup" : "resolvectl query",
     "route" : "ip route",
     "service" :"systemctl",
-    "traceroute" : "tracepath",
-    "vi" : "vim -u NONE -C"
+    "traceroute" : "tracepath"
 }
 
 unsupported_package_managers = [