feat: add CI, improve benchmark, fix issue statix created and remove statix

flake.nix

@@ -23,6 +23,7 @@
         (simple "tests")
         (simple "benchmark")
         (simple "docs")
+        (simple "ci")
       ];
     }
     {
@@ -30,6 +31,7 @@
         ["repo" "tests"]
         ["repo" "benchmark"]
         ["repo" "docs"]
+        ["repo" "ci" "packages"]
       ];
     };
 }