Example/modification of Account._unclaimed_register()

[sla-te]

Summary

• Created an example for using account_unclaimed_register() and have modified the required functions for it to work properly. Maybe you can successfully fix, that the created account gets locked and disabled, see comments inside the example.
• Changed the Base-API-Url to v9 from v7
• Changed the aiohttp requirement to aiohttp[speedups] so it installts brotli compression (which is enabled by default for users) and enabled br correspondingly in all required locations
• Added a captcha solver utility function inside the example which is based on the 2captcha-python lib

General Info

• [x] If code changes were made then they have been tested.
• [x] This PR adds something new (e.g. new method or parameters).

[sla-te]

Hey, thank you for reviewing this, glad you are actively working on it, keep it up. x) - Ill wait for you to push a couple more updates and then open another PR