Mage package configuration

Implemented a package configuration for Mage (1), a make/rake-like build
tool using Go allowing to write plain-old go functions that'll
automatically be used as Makefile-like runnable targets.

>>>> Environment variables

See the official documentation about environment variables (2) for more
information.

>>>>>> `MAGEFILE_CACHE`

Set the path of the directory for the magefile build cache from the
default location `$HOME/.magefile` to `/tmp/.magefiles` since there is
no need to persist the cache across system restarts.

References:
  (1) https://magefile.org
  (2) https://magefile.org/environmen

Resolves GH-192

snowblocks/bash/config/pkg/mage

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2016-present Arctic Ice Studio <[email protected]>
+# Copyright (C) 2016-present Sven Greb <[email protected]>
+
+# Project:    igloo
+# Repository: https://github.com/arcticicestudio/igloo
+# License:    MIT
+
+# Set the path of the directory for the magefile build cache.
+# The default is `$HOME/.magefile`, but there is no need to persist the cache across system restarts.
+#
+# @see https://magefile.org/environment
+export MAGEFILE_CACHE="/tmp/.magefiles"