Add a basic, empty spline UI based on Angular

The page doesn't do anything yet, but should let people build up a
more complex UI.

This is effectively a super stripped down version of the scouting app.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Ia97a3670439f4c3f208f8110282645aa0e3862f1
diff --git a/WORKSPACE b/WORKSPACE
index 6be969d..ad59314 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -944,6 +944,7 @@
     name = "npm",
     data = [
         "//aos/analysis/foxglove_extension:package.json",
+        "//control_loops/swerve/spline_ui/www:package.json",
         "@//:package.json",
         "@//:pnpm-workspace.yaml",
         "@//scouting/webserver/requests/messages:package.json",