flameshot: add settings option

tests/modules/services/flameshot/default.nix

@@ -0,0 +1,4 @@
+{
+  flameshot-empty-settings = ./empty-settings.nix;
+  flameshot-example-settings = ./example-settings.nix;
+}

tests/modules/services/flameshot/empty-settings.nix

@@ -0,0 +1,13 @@
+{ ... }:
+
+{
+  config = {
+    services.flameshot = { enable = true; };
+
+    test.stubs.flameshot = { };
+
+    nmt.script = ''
+      assertPathNotExists home-files/.config/flameshot/flameshot.ini
+    '';
+  };
+}

tests/modules/services/flameshot/example-settings.nix

@@ -0,0 +1,30 @@
+{ ... }:
+
+{
+  config = {
+    services.flameshot = {
+      enable = true;
+
+      settings = {
+        General = {
+          disabledTrayIcon = true;
+          showStartupLaunchMessage = false;
+        };
+      };
+    };
+
+    test.stubs.flameshot = { };
+
+    nmt.script = ''
+      assertFileContent \
+        home-files/.config/flameshot/flameshot.ini \
+        ${
+          builtins.toFile "expected.ini" ''
+            [General]
+            disabledTrayIcon=true
+            showStartupLaunchMessage=false
+          ''
+        }
+    '';
+  };
+}