Add formatting team (#1337)

As [established by RFC
166](https://github.com/NixOS/rfcs/blob/master/rfcs/0166-nix-formatting.md#nix-formatter-team),
see also NixOS/nixfmt#153.

Before merging I'd like all members to give their okay with their entry.
Ping @NixOS/nix-formatting

---------

Co-authored-by: Sereja313 <[email protected]>

src/content/teams/12_formatting.mdx

@@ -0,0 +1,30 @@
+---
+name: Nix Formatting Team
+description: Maintains the official Nix formatter and standard format.
+members:
+- name: Silvan Mosberger
+  github: infinisil
+  title: Administrative leader, sponsored by Tweag and Antithesis
+- name: piegames
+  github: piegamesde
+  title: Main developer
+- name: Thomas Bereknyei
+  github: tomberek
+  title: Supporting developer, sponsored by Flox
+- name: "0x4A6F"
+  github: "0x4A6F"
+  title:
+- name: Sergey Gulin
+  github: Sereja313
+  title: Sponsored by Serokell
+- name: Janne Heß
+  github: dasJ
+  title:
+contact:
+- name: Team page
+  href: https://github.com/NixOS/nixfmt/tree/master/team
+---
+
+The Nix formatting team was established by [RFC 166](https://github.com/NixOS/rfcs/pull/166) and is in charge of:
+- Maintaining the [official Nix formatter](https://github.com/NixOS/nixfmt)
+- Applying the official Nix formatter to [Nixpkgs](https://github.com/nixos/nixpkgs/)

src/pages/community/teams/[...slug].astro

@@ -35,6 +35,11 @@ const { Content } = await entry.render();
                 (<a href={"https://discourse.nixos.org/u/" + member.discourse}>@{member.discourse}</a>)
                 </>
               )}
+              {member.github && (
+                <>
+                (<a href={"https://github.com/" + member.github}>@{member.github}</a>)
+                </>
+              )}
               {member.title && (
                 <>
                 &mdash;