feat: add dateTime helpers

[kevinlee11]

localizeDate was already an existing helper that existed but wasn't exposed. Adding it to the SDK's available helpers alongside the dateFormats it makes use of.

[github-actions]

size-limit report 📦

Path	Size
lib/index.js	6.43 KB (+0.54% 🔺)
lib/index.umd.cjs	6.59 KB (+0.53% 🔺)

[github-actions]

📊 Package size report   2%↑

File	Before	After
lib/helpers/datetime.d.ts	2.3 kB	113%↑4.8 kB
lib/index.d.ts	859 B	9%↑934 B
lib/index.js	40.4 kB	0.3%↑40.6 kB
lib/index.umd.cjs	19.8 kB	0.5%↑19.9 kB
Total (Includes all files)	123.9 kB	2%↑126.7 kB
Tarball size	32.2 kB	1%↑32.5 kB

Unchanged files

File	Size
lib/api/cart.d.ts	6.2 kB
lib/api/customers.d.ts	1.3 kB
lib/api/orders.d.ts	782 B
lib/api/places.d.ts	1.3 kB
lib/api/resources.d.ts	1.3 kB
lib/api/template.d.ts	686 B
lib/clients/buyers.d.ts	236 B
lib/helpers/auth.d.ts	239 B
lib/helpers/cookies.d.ts	71 B
lib/helpers/item.d.ts	3.7 kB
lib/helpers/location.d.ts	3.9 kB
lib/helpers/money.d.ts	1.5 kB
lib/types/api/cart/index.d.ts	14.9 kB
lib/types/api/cart/private.types.d.ts	829 B
lib/types/api/customers/index.d.ts	427 B
lib/types/api/orders/index.d.ts	346 B
lib/types/api/places/index.d.ts	1.9 kB
lib/types/api/resources/index.d.ts	4.2 kB
lib/types/api/resources/private.types.d.ts	60 B
lib/types/api/template/index.d.ts	808 B
lib/types/clients/buyers.private.d.ts	365 B
lib/types/helpers/datetime/index.d.ts	3.9 kB
lib/types/helpers/item/index.d.ts	3.2 kB
lib/types/helpers/location/index.d.ts	3.4 kB
lib/types/helpers/money/index.d.ts	92 B
lib/types/looseobject.d.ts	78 B
LICENSE	1.1 kB
package.json	2.2 kB
README.md	1.6 kB

_{🤖 This report was automatically generated by pkg-size-action}

[github-actions]

🎉 This PR is included in version 1.0.0-alpha.9 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀