cli: default template url should come from the package itself rather than our gitea

This allow easier testing and also forks.

templates/flake-module.nix

@@ -1,35 +1,26 @@
 { self, inputs, ... }:
 {
-  flake.templates = {
-    new-clan = {
-      description = "Initialize a new clan flake";
-      path = ./new-clan;
-    };
-    default = self.templates.new-clan;
-    minimal = {
-      description = "for clans managed via (G)UI";
-      path = ./minimal;
-    };
-  };
-  flake.checks.x86_64-linux.template-minimal =
-    let
-      path = self.templates.minimal.path;
-      initialized = inputs.nixpkgs.legacyPackages.x86_64-linux.runCommand "minimal-clan-flake" { } ''
-        mkdir $out
-        cp -r ${path}/* $out
-        mkdir -p $out/machines/foo
-        echo '{ "nixpkgs": { "hostPlatform": "x86_64-linux" } }' > $out/machines/foo/settings.json
-      '';
-      evaled = (import "${initialized}/flake.nix").outputs {
-        self = evaled // {
-          outPath = initialized;
+  flake = (import ./flake.nix).outputs {} // {
+    checks.x86_64-linux.template-minimal =
+      let
+        path = self.templates.minimal.path;
+        initialized = inputs.nixpkgs.legacyPackages.x86_64-linux.runCommand "minimal-clan-flake" { } ''
+          mkdir $out
+          cp -r ${path}/* $out
+          mkdir -p $out/machines/foo
+          echo '{ "nixpkgs": { "hostPlatform": "x86_64-linux" } }' > $out/machines/foo/settings.json
+        '';
+        evaled = (import "${initialized}/flake.nix").outputs {
+          self = evaled // {
+            outPath = initialized;
+          };
+          clan-core = self;
         };
-        clan-core = self;
+      in
+      {
+        type = "derivation";
+        name = "minimal-clan-flake-check";
+        inherit (evaled.nixosConfigurations.foo.config.system.build.vm) drvPath outPath;
       };
-    in
-    {
-      type = "derivation";
-      name = "minimal-clan-flake-check";
-      inherit (evaled.nixosConfigurations.foo.config.system.build.vm) drvPath outPath;
-    };
+  };
 }

templates/flake.nix

@@ -0,0 +1,16 @@
+{
+  outputs =
+    { ... }:
+    {
+      templates = {
+        default = {
+          description = "Initialize a new clan flake";
+          path = ./new-clan;
+        };
+        minimal = {
+          description = "for clans managed via (G)UI";
+          path = ./minimal;
+        };
+      };
+    };
+}