Add support of bilibili

[zgyhim]

Link to the site main page:https://www.bilibili.com/
Link to an existing account: https://space.bilibili.com/327757321
Link to a nonexistent account: https://space.bilibili.com/32775732155555
Tags: Anime Video “User-generated content”

[zgyhim]

You may need documentation like https://sessionhu.github.io/bilibili-API-collect/ or a library like https://pypi.org/project/bilibili-api-python/. When the searched username (if there is a result and it matches the username input by the user), then that proves the user has been found.

[soxoj]

@zgyhim I added support of bilibili: search by an ID
Docs in Chinese: https://maigret.readthedocs.io/zh-cn/latest/supported-identifier-types.html#example
Docs in English: https://maigret.readthedocs.io/en/latest/supported-identifier-types.html#example