feat: Add vector clone

src/vector/helpers.js

@@ -0,0 +1,15 @@
+import {Vector} from './Vector.js'
+import {NotAType, Returns} from '#core/Type.js'
+import {match} from '#core/TypePatterns.js'
+
+export const promoteUnary = name => match(Vector, (math, V, strategy) => {
+   if (V.Component === NotAType) {
+      // have to resolve element by element :-(
+      return Returns(V, v => v.map(
+         elt => math.resolve(name, math.typeOf(elt), strategy)(elt)))
+   }
+   const compOp = math.resolve(name, V.Component, strategy)
+   return Returns(Vector(compOp.returns), v => v.map(elt => compOp(elt)))
+})
+
+