fix: add writer

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

writer/eq.go

@@ -0,0 +1,16 @@
+package writer
+
+import (
+	EQ "github.com/IBM/fp-go/eq"
+	G "github.com/IBM/fp-go/writer/generic"
+)
+
+// Constructs an equal predicate for a [Writer]
+func Eq[W, A any](w EQ.Eq[W], a EQ.Eq[A]) EQ.Eq[Writer[W, A]] {
+	return G.Eq[Writer[W, A]](w, a)
+}
+
+// FromStrictEquals constructs an `Eq` from the canonical comparison function
+func FromStrictEquals[W, A comparable]() EQ.Eq[Writer[W, A]] {
+	return G.FromStrictEquals[Writer[W, A]]()
+}