lib: deprecate `refresh` function

With great power comes great responsibility. This function is
somewhat low level, and is harmful to shell's user, as it
completely screws up with job control (subprocesses).

This PR officially marks `refresh` as deprecated, moving the
deprecated functionality to omf plugin `compat` quarantine
directory.

lib/refresh.fish

-# SYNOPSIS
-#   refresh
-#
-# OVERVIEW
-#   Refresh (reload) the current fish session.
-
-function refresh -d "Refresh fish session by replacing current process"
-  if not set -q CI
-    history --save
-    exec fish < /dev/tty
-  end
-end

pkg/omf/functions/compat/refresh.fish

+function refresh -d "(deprecated) Refresh fish session by replacing current process"
+  echo (status -t)[5] | read -la caller
+  printf 'warning: function %srefresh%s is deprecated and will be removed soon.\n' \
+  (set_color -u) (set_color normal)
+
+  contains input $caller
+    or echo $caller
+
+  set -q CI
+    and return 0
+
+  type -q omf.core.reload
+    and omf.core.reload
+
+  # If omf.core.reload exist, current fish will be replaced via exec, so
+  # the code below will never be reached. When it doesn't exist, the code
+  # below, the deprecated method, will be used as fallback.
+
+  history --save
+  exec fish
+end