Add YASA Flaskified details to README and FAQ

[bartromb]

This pull request adds information about YASA Flaskified, a web-based application built using the YASA library, to the project's documentation:

README.rst:
    Added a "Related Projects" section with a brief description of YASA Flaskified.
    Included a link to the YASA Flaskified GitHub repository.

docs/faq.rst:
    Added a collapsible section titled "Related Projects" under "Others."
    Provided details about YASA Flaskified's features, deployment options, and repository link in a structured FAQ format.

These changes aim to introduce users to YASA Flaskified as an extension of YASA for those who prefer a web-based interface or need deployment options for their own servers.