news: Add entry about this authenticated channel

In order to ease distribution of the various machine configurations defined within this
repository, make this repository an authenticated Guix channel.

* .guix-authorizations: Add a single authorized key to start
* .guix-channel: Set various channel details
* news.txt: Provide an initial news item

.guix-channel

@@ -2,5 +2,6 @@
 
 (channel
  (version 0)
+ (directory ".guix")
  (news-file "news.txt")
  (url "https://git.rekahsoft.ca/rekahsoft/guix-north-america.git"))

news.txt

@@ -1,6 +1,6 @@
 (channel-news
  (version 0)
- (entry (commit "6cf7f9a72eae0333705518ee865a72ea4b63399b")
+ (entry (commit "c0979ad86fdf0b403c60d5767328cb862ecc00ef")
         (title (en "guix-north-america channel with authenticated updates"))
         (body
          (en "guix-north-america is now a channel (which primary is used as a means to distributes configuration).
@@ -16,7 +16,7 @@ instead. To ensure you only receive genuine updates from this channel, you shoul
  (url \"https://git.rekahsoft.ca/rekahsoft/guix-north-america\")
  (INTRODUCTION
   (make-channel-introduction
-   \"6cf7f9a72eae0333705518ee865a72ea4b63399b\"
+   \"c0979ad86fdf0b403c60d5767328cb862ecc00ef\"
    (openpgp-fingerprint
     \"F8D5 46F3 AF37 EF53 D1B6  48BE 7B4D EB93 212B 3022\"))))
 @end lisp "))))