stdlib: register Stdlib.EmbeddedCurveOps.Bn254 in the library root

The module was never imported by `Stdlib.Stdlib`, so CI never elaborated
it. Registering it surfaced one bitrot fix: Mathlib's
`WeierstrassCurve.Affine.Point.some` now takes `x y` explicitly.

Author: Eduardogbg

stdlib/lampe/Stdlib/EmbeddedCurveOps/Bn254.lean

@@ -27,7 +27,7 @@ private theorem bn254_generator_nonsingular :
 /-- The Grumpkin generator as a Mathlib `WeierstrassCurve.Affine.Point`
 over the BN254 scalar field. -/
 def generatorPoint : (affineCurve Bn254.prime).Point :=
-  .some bn254_generator_nonsingular
+  .some _ _ bn254_generator_nonsingular
 
 @[simp] theorem generator_eq_encodeCurvePoint :
     (Lampe.Stdlib.EmbeddedCurveOps.Point.generator

stdlib/lampe/Stdlib/Stdlib.lean

@@ -11,6 +11,7 @@ import Stdlib.Compat
 import Stdlib.Convert
 import Stdlib.Default
 import Stdlib.EmbeddedCurveOps
+import Stdlib.EmbeddedCurveOps.Bn254
 import Stdlib.Extra
 import Stdlib.Field
 import Stdlib.Field.Bn254