Add geofencing to prevent running this software in California in order to avoid legal liabilities from AB 1043

[Giwayume]

Reference:
https://www.troutmanprivacy.com/2025/10/analyzing-californias-digital-age-assurance-act/

AB 1043 requires operating systems to collect user's age, and applications (like git) to receive age bracket signals, whether they use them or not.

Just by knowing the user's age, git will become legally responsible under other sets of laws like CCPA which prohibit collection of minor's personal information, and provide hefty fines for violations.

It is in the project's, and the world's, best interest to prohibit use of git inside of the state of California, so there are no lawsuits under these regulations. Hopefully with enough resistance these laws will be overturned when their impracticality is realized.