📝 Bind the handler-map function in every example

Each README and JSDoc example now assigns the function that takes the
handler object (the factory result, or the tagged key step) to a match…
variable and reuses it, so the builder is created once instead of per
call.

src/primitive-union.ts

@@ -111,7 +111,8 @@ const dispatch =
  * @typeParam T - The finite universe of primitive members to match.
  * @returns A builder for the handler map, or the handler map plus a fallback.
  * @example
- *     const describe = getPrimitiveUnionMatcher<"yes" | "no">()({
+ *     const matchAnswer = getPrimitiveUnionMatcher<"yes" | "no">();
+ *     const describe = matchAnswer({
  *         yes: () => "agreed",
  *         no: () => "declined",
  *     });
@@ -133,7 +134,8 @@ export const getPrimitiveUnionMatcher = <
  * @typeParam T - The finite universe of primitive members to match.
  * @returns A builder for the handler map, or the handler map plus a fallback.
  * @example
- *     const reply = getPrimitiveUnionMatcherW<"yes" | "no">()({
+ *     const matchReply = getPrimitiveUnionMatcherW<"yes" | "no">();
+ *     const reply = matchReply({
  *         yes: () => 1,
  *         no: () => "declined",
  *     });