v3.0.0-alpha.6

NOTE: Documentation work is in progress (https://resty.dev). Of course, v3 Godoc is up-to-date. Also, refer to test cases for usage.

• feat: Client Circuit Breaker by @segevda in #930
• feat(enhancement)!: seperate generate curl cmd from debug flow #928 by @jeevatkm in #934
• cleanup, sponsor links and readme by @jeevatkm in #935
• feat(enhancement): update godoc, method signature, and cleanup unused symbols by @jeevatkm in #936