consistently use tarball urls in documentation

otherwise users not using our templates will find themselves missing
git.

docs/site/guides/clanServices.md

@@ -60,7 +60,7 @@ If you used `clan-core` as an input attribute for your flake:
 
 ```nix
       # ↓ module.input = "clan-core"
-inputs.clan-core.url = "git+https://git.clan.lol/clan/clan-core"
+inputs.clan-core.url = "https://git.clan.lol/clan/clan-core/archive/main.tar.gz";
 ```
 
 ## Simplified Example

docs/site/guides/flake-parts.md

@@ -17,7 +17,7 @@ inputs = {
   flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
 
   clan-core = {
-    url = "git+https://git.clan.lol/clan/clan-core";
+    url = "https://git.clan.lol/clan/clan-core/archive/main.tar.gz";
     inputs.nixpkgs.follows = "nixpkgs"; # Don't do this if your machines are on nixpkgs stable.
     # New
     inputs.flake-parts.follows = "flake-parts";

docs/site/guides/getting-started/create-installer.md

@@ -55,7 +55,7 @@ sudo umount /dev/sdb1
     - Set your preferred language and keymap
 
     ```bash
-    clan flash write --flake git+https://git.clan.lol/clan/clan-core \
+    clan flash write --flake https://git.clan.lol/clan/clan-core/archive/main.tar.gz \
       --ssh-pubkey $HOME/.ssh/id_ed25519.pub \
       --keymap us \
       --language en_US.UTF-8 \

docs/site/guides/getting-started/index.md

@@ -41,7 +41,7 @@ By the end of this guide, you'll have a fresh NixOS configuration ready to push
 Create a new clan
 
 ```bash
-nix run git+https://git.clan.lol/clan/clan-core#clan-cli --refresh -- flakes create
+nix run https://git.clan.lol/clan/clan-core/archive/main.tar.gz#clan-cli --refresh -- flakes create
 ```
 
 This should prompt for a *name*:

docs/site/guides/migrations/migration-guide.md

@@ -50,7 +50,7 @@ manage your configurations with clan.
 
 ```nix
 inputs.clan-core = {
-  url = "git+https://git.clan.lol/clan/clan-core";
+  url = "https://git.clan.lol/clan/clan-core/archive/main.tar.gz";
   # Don't do this if your machines are on nixpkgs stable.
   inputs.nixpkgs.follows = "nixpkgs";
 }
@@ -79,7 +79,7 @@ For the provide flake example, your flake should now look like this:
   inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
   inputs.clan-core = {
-    url = "git+https://git.clan.lol/clan/clan-core";
+    url = "https://git.clan.lol/clan/clan-core/archive/main.tar.gz";
     inputs.nixpkgs.follows = "nixpkgs";
   };