v2.8.2

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# v2.8.2: Fixes regression related to updating weight, height, length, and width on products

This release fixes a regression introduced in v2.8.2 when updating weight, height, length, and width on products.

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## Highlights

### Fixes regression related to updating weight, height, length, and width on products

## Features
* feat: define validators and use normalize-products step by @thetutlage in https://github.com/medusajs/medusa/pull/12473

## Bugs
* fix(types): change update signature of IAuthProvider by @shahednasser in https://github.com/medusajs/medusa/pull/12496
* fix: fix weight/length/height/width types in updates by @peterlgh7 in https://github.com/medusajs/medusa/pull/12500
* fix(core-flows): fulfilment cancelation with shared inventory kit item by @fPolic in https://github.com/medusajs/medusa/pull/12503

## Documentation
* docs: add missing methods in guides and references by @shahednasser in https://github.com/medusajs/medusa/pull/12495
* docs: improve payment-related guides by @shahednasser in https://github.com/medusajs/medusa/pull/12502
* docs: update examples in sendgrid guide by @shahednasser in https://github.com/medusajs/medusa/pull/12504

## Chores
* chore(types, utils): TSDoc improvements for providers by @shahednasser in https://github.com/medusajs/medusa/pull/12498


**Full Changelog**: https://github.com/medusajs/medusa/compare/v2.8.1...v2.8.2