Create dnf plugin

Adds some useful aliases

plugins/dnf/dnf.plugin.zsh

+## Aliases
+
+alias dnfl="dnf list"                       # List packages
+alias dnfli="dnf list installed"            # List installed packages
+alias dnfgl="dnf grouplist"                 # List package groups
+alias dnfmc="dnf makecache"                 # Generate metadata cache
+alias dnfp="dnf info"                       # Show package information
+alias dnfs="dnf search"                     # Search package
+
+alias dnfu="sudo dnf update"                # Upgrade package
+alias dnfi="sudo dnf install"               # Install package
+alias dnfgi="sudo dnf groupinstall"         # Install package group
+alias dnfr="sudo dnf erase"                 # Remove package
+alias dnfgr="sudo dnf groupremove"          # Remove package group
+alias dnfc="sudo dnf clean all"             # Clean cache