add stepBind, and add toplevel aliases for this and other binds

packages/core/pattern.mjs

@@ -1493,6 +1493,13 @@ export const struct = curry((a, b) => reify(b).struct(a));
 export const superimpose = curry((a, b) => reify(b).superimpose(...a));
 export const withValue = curry((a, b) => reify(b).withValue(a));
 
+export const bind = curry((a, b) => reify(b).bind(a));
+export const innerBind = curry((a, b) => reify(b).innerBind(a));
+export const outerBind = curry((a, b) => reify(b).outerBind(a));
+export const squeezeBind = curry((a, b) => reify(b).squeezeBind(a));
+export const stepBind = curry((a, b) => reify(b).stepBind(a));
+export const polyBind = curry((a, b) => reify(b).polyBind(a));
+
 // operators
 export const set = curry((a, b) => reify(b).set(a));
 export const keep = curry((a, b) => reify(b).keep(a));
@@ -2540,6 +2547,10 @@ Pattern.prototype.stepJoin = function () {
   return new Pattern(q, first_t);
 };
 
+Pattern.prototype.stepBind = function (func) {
+  return this.fmap(func).stepJoin();
+};
+
 export function _retime(timedHaps) {
   const occupied_perc = timedHaps.filter((t, pat) => pat.hasTactus).reduce((a, b) => a.add(b), Fraction(0));
   const occupied_tactus = removeUndefineds(timedHaps.map((t, pat) => pat.tactus)).reduce(