User setting to select preferred theme for the user - dark, light, system

[janhvipatil]

No description provided.

[DeViLSOuL21]

we'd like to contribute for this project for the following issue as a part of our project! hope you find the request.

[rajzzz]

We would like to work on this issue as our project! let us know if its open.

[nikkothari22]

Since this issue has more than 1 applicant, I won't be able to assign it to one person. You're free to take this up.

Also, related to the issue: the user preference needs to be stored in local storage, and please refer to the UI available on Cal.com for the theme switcher setting.