Klaviyo-api-beta

- None: only documentation changes

- None: only documentation changes

- Removed the following endpoints, as they have been upgraded out of Beta and moved into our Stable SDK:
- Data Privacy
- All Tags endpoints, as well as the following related resource-specific endpoints:
- Get Flow Tags
- Get List Tags
- Get Segment Tags

- Added Campaigns endpoints

* Initial release

NOTE: This SDK only reflects the endpoints currently in Beta. Once endpoints are promoted from Beta to General Availability (GA), they will be removed from the next version of this SDK, and the version of this SDK corresponding to that Beta release will be deprecated.

- Namespace changes
- Pypi package name: `klaviyo-api` → `klaviyo-api-beta`
- Module name: `klaviyo_api` → `klaviyo_api_beta`
- client name: `KlaviyoAPI` → `KlaviyoAPIBeta`
- Client variable name in readme examples: `klaviyo` → `klaviyo_beta`
- New resources and endpoints: see [API Changelog](https://developers.klaviyo.com/en/docs/changelog_) for full details