scss-lint: move to pkgs/by-name, update ffi

- Relocated from pkgs/development/tools/scss-lint to pkgs/by-name/sc/scss-lint
  following the by-name directory convention.
- Updated ffi from 1.17.1 → 1.17.2 with corresponding sha256 refresh.
- Regenerated gemset.nix to include explicit groups/platforms for sass-listen.
- Replaced old Gemfile.lock (with multiple platform entries) with a new
  normalized lockfile (bundler 2.7.1).
- Removed top-level alias from all-packages.nix.

This keeps scss-lint reproducible under current RubyGems and aligns it with
the by-name package layout.

pkgs/by-name/sc/scss-lint/Gemfile.lock

@@ -0,0 +1,23 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ffi (1.17.2)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    scss_lint (0.60.0)
+      sass (~> 3.5, >= 3.5.5)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  scss_lint
+
+BUNDLED WITH
+   2.7.1

pkgs/by-name/sc/scss-lint/gemset.nix

@@ -4,10 +4,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0fgwn1grxf4zxmyqmb9i4z2hr111585n9jnk17y6y7hhs7dv1xi6";
+      sha256 = "19kdyjg3kv7x0ad4xsd4swy5izsbb1vl1rpb6qqcqisr5s23awi9";
       type = "gem";
     };
-    version = "1.17.1";
+    version = "1.17.2";
   };
   rb-fsevent = {
     groups = [ "default" ];
@@ -46,6 +46,8 @@
       "rb-fsevent"
       "rb-inotify"
     ];
+    groups = [ "default" ];
+    platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
       sha256 = "0xw3q46cmahkgyldid5hwyiwacp590zj2vmswlll68ryvmvcp7df";

pkgs/development/tools/scss-lint/Gemfile.lock

@@ -1,43 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    ffi (1.17.1)
-    ffi (1.17.1-aarch64-linux-gnu)
-    ffi (1.17.1-aarch64-linux-musl)
-    ffi (1.17.1-arm-linux-gnu)
-    ffi (1.17.1-arm-linux-musl)
-    ffi (1.17.1-arm64-darwin)
-    ffi (1.17.1-x86-linux-gnu)
-    ffi (1.17.1-x86-linux-musl)
-    ffi (1.17.1-x86_64-darwin)
-    ffi (1.17.1-x86_64-linux-gnu)
-    ffi (1.17.1-x86_64-linux-musl)
-    rb-fsevent (0.11.2)
-    rb-inotify (0.11.1)
-      ffi (~> 1.0)
-    sass (3.7.4)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-    scss_lint (0.60.0)
-      sass (~> 3.5, >= 3.5.5)
-
-PLATFORMS
-  aarch64-linux-gnu
-  aarch64-linux-musl
-  arm-linux-gnu
-  arm-linux-musl
-  arm64-darwin
-  ruby
-  x86-linux-gnu
-  x86-linux-musl
-  x86_64-darwin
-  x86_64-linux-gnu
-  x86_64-linux-musl
-
-DEPENDENCIES
-  scss_lint
-
-BUNDLED WITH
-   2.6.2

pkgs/top-level/all-packages.nix

@@ -6870,8 +6870,6 @@ with pkgs;
   sbt-with-scala-native = callPackage ../development/tools/build-managers/sbt/scala-native.nix { };
   simpleBuildTool = sbt;
 
-  scss-lint = callPackage ../development/tools/scss-lint { };
-
   shake =
     # TODO: Erroneous references to GHC on aarch64-darwin: https://github.com/NixOS/nixpkgs/issues/318013
     (