style(*): move projects to projects/

Most of this is fairly straightforward, there's just a couple of bits of
complication:
- We need to update packetmix to use the new clone URL
- The order filters are applied in really matters, we need to add the
folders first before we then move out from the top of the workspace
- Our README also needs updating

README.md

···
 be used to filter your clone:
 
 ```bash
-git clone https://git.freshlybakedca.ke/patisserie.git:workspace=packetmix.git packetmix
-# Swap out the "packetmix"es at the end of the command for whatever project you want to clone
+git clone https://git.freshlybakedca.ke/patisserie.git:workspace=projects/packetmix.git
+# Swap out the "packetmix" at the end of the command for whatever project you want to clone
 ```
 
 If you need to push then, as with *tangled* normally, you are required to use
···
 to use SSH.
 
 ```bash
-git remote set-url --push ssh://[e-mail]/patisserie.git:workspace=packetmix.git
+git remote set-url --push ssh://[e-mail]/patisserie.git:workspace=projects/packetmix.git
 # Swap out "packetmix" at the end of the URL for whatever project you have cloned
 ```
 

packetmix/systems/common/packetmix.nix

···
   systemd.services.nixos-upgrade.preStart = ''
     ${pkgs.networkmanager}/bin/nm-online -s -q # wait until the internet is online, as esp. if we go offline we need to wait to retry...
     cd /etc/nixos
+    ${pkgs.git}/bin/git remote set-url origin https://git.freshlybakedca.ke/patisserie.git:workspace=projects/packetmix.git
     ${pkgs.git}/bin/git fetch
     ${pkgs.git}/bin/git checkout origin/release
   '';

packetmix/workspace.josh projects/packetmix/workspace.josh

···
 ::.tangled/
 ::LICENSES/
+:/packetmix

projects/sprinkles/workspace.josh

···
+::LICENSES/
+:/sprinkles

sprinkles/workspace.josh

···
-::LICENSES/