Python-amazon-paapi

Changes:

- Added NL region support.

**Changes:**
- Allow sending several products ids on get_product.
- Updated get_asin for new URL format.
- Added NL region support.
- Removed type hints.

**New features:**
- Allow searching by browse_node or search_index alone.

**Documentation:**
- Added license files for Amazon SDK.

**Bug fixes:**
- Fixed incorrect pages count typo.
- Fixed print AmazonBrowseNode error.

**New features:**
* Added serializer class for Django REST framework.

**Bug fixes:**
* Improved error handling when getting a non existent product.
* Fixed typo for product length.

**New features:**
- Added new method for getting browse nodes information.

**Minor changes:**
- Removed the 10 pages limit on search_products and get_variations methods.

**Bug fixes:**
- Solved unnecessary API call on search_products and get_variations methods.

**Major changes:**
* Improved throttling and now possible to disable it.
* Added paapi5-python-sdk and removed amightygirl.paapi5-python-sdk.

**Bug fixes:**
* Fixed pool exception on SDK.

**Minor changes:**
* Added throttling as method.
* Updated documentation.