Add deprecation notice for fedora and go plugins.

plugins/fedora/fedora.plugin.zsh

@@ -1 +0,0 @@
-../dnf/dnf.plugin.zsh

plugins/fedora/fedora.plugin.zsh

@@ -0,0 +1,3 @@
+print -P "%F{yellow}The 'fedora' plugin is deprecated. Use the '%Udnf%u' plugin instead.%f"
+
+source "$ZSH/plugins/dnf/dnf.plugin.zsh"

plugins/go/go.plugin.zsh

@@ -1 +0,0 @@
-../golang/golang.plugin.zsh

plugins/go/go.plugin.zsh

@@ -0,0 +1,3 @@
+print -P "%F{yellow}The 'go' plugin is deprecated. Use the '%Ugolang%u' plugin instead.%f"
+
+source "$ZSH/plugins/golang/golang.plugin.zsh"